diff --git a/src/ts/@loafer/context/decorator/Configuration.ts b/src/ts/@loafer/context/decorator/Configuration.ts
index d4bc3f2..e1b4914 100644
--- a/src/ts/@loafer/context/decorator/Configuration.ts
+++ b/src/ts/@loafer/context/decorator/Configuration.ts
@@ -15,7 +15,7 @@ const Configuration = (qualifier?: string | symbol ) => createDecorator('Configu
       throw new Error('Cannot apply @Injectable or @Injectable stereotype decorator multiple times.');
     }
 
-    configurationDefinition = getConfigurationDefinition(target, true);
+    configurationDefinition = getConfigurationDefinition(target.prototype, true);
     configurationDefinition.Stereotype = InjectableSterotype.CONFIGURATION;
     configurationDefinition.Qualifier = validateQualifier(target.prototype, qualifier);
 
diff --git a/src/ts/@loafer/context/decorator/PouchConfig.ts b/src/ts/@loafer/context/decorator/PouchConfig.ts
index d7c660c..d9fbf72 100644
--- a/src/ts/@loafer/context/decorator/PouchConfig.ts
+++ b/src/ts/@loafer/context/decorator/PouchConfig.ts
@@ -1,6 +1,8 @@
+import { ClassType, PropertyType } from '@loafer/core/constants';
+
 interface PouchConfig {
-  qualifier?: string | symbol;
-  type?: any;
+  qualifier?: PropertyType;
+  type?: ClassType;
 }
 
 export default PouchConfig;
diff --git a/src/ts/@loafer/context/decorator/Service.ts b/src/ts/@loafer/context/decorator/Service.ts
index 216f151..80e6779 100644
--- a/src/ts/@loafer/context/decorator/Service.ts
+++ b/src/ts/@loafer/context/decorator/Service.ts
@@ -15,7 +15,7 @@ const Service = (qualifier?: string | symbol ) => createDecorator('Service', {
       throw new Error('Cannot apply @Injectable or @Injectable stereotype decorator multiple times.');
     }
 
-    injectableDefinition = getInjectableDefinition(target, true);
+    injectableDefinition = getInjectableDefinition(target.prototype, true);
     injectableDefinition.Stereotype = InjectableSterotype.SERVICE;
     injectableDefinition.Qualifier = validateQualifier(target.prototype, qualifier);
 
diff --git a/src/ts/@loafer/context/definition/ConfigurationDefinition.ts b/src/ts/@loafer/context/definition/ConfigurationDefinition.ts
index 7c912b4..7120b60 100644
--- a/src/ts/@loafer/context/definition/ConfigurationDefinition.ts
+++ b/src/ts/@loafer/context/definition/ConfigurationDefinition.ts
@@ -1,20 +1,20 @@
-import { DESIGN_RETURNTYPE } from '@loafer/core/constants';
+import { ClassType, DESIGN_RETURNTYPE, PropertyType } from '@loafer/core/constants';
 import InjectableDefinition from '@loafer/context/definition/InjectableDefinition';
 import PouchConfig from '@loafer/context/decorator/PouchConfig';
 
 class ConfigurationDefinition extends InjectableDefinition {
-  protected _qualifier: string | symbol = undefined;
+  protected _qualifier: PropertyType = undefined;
   protected _pouchMap: Map<string, PouchConfig>;
 
-  public constructor(type: Object) {
-    super(type);
+  public constructor(clazz: ClassType) {
+    super(clazz);
   }
 
   public addPouch(propertyKey: string, pouchConfig: PouchConfig): void {
     if (undefined === this._pouchMap) {
       this._pouchMap = new Map();
     }
-    let returnType: any = Reflect.getMetadata(DESIGN_RETURNTYPE, this._type, propertyKey);
+    let returnType: any = Reflect.getMetadata(DESIGN_RETURNTYPE, this._clazz, propertyKey);
 
     if (undefined === pouchConfig.type) {
       pouchConfig.type = returnType;
diff --git a/src/ts/@loafer/context/definition/InjectableDefinition.ts b/src/ts/@loafer/context/definition/InjectableDefinition.ts
index c376f7b..d4db5f7 100644
--- a/src/ts/@loafer/context/definition/InjectableDefinition.ts
+++ b/src/ts/@loafer/context/definition/InjectableDefinition.ts
@@ -1,21 +1,22 @@
+import { ClassType, PropertyType } from '@loafer/core/constants';
 import PouchDefinition from '@loafer/pouches/factory/config/PouchDefinition';
 import { InjectableSterotype, PouchScope } from '@loafer/pouches/constants';
 
 class InjectableDefinition implements PouchDefinition {
-  protected _type: Object;
+  protected _clazz: ClassType;
   protected _stereotype: InjectableSterotype;
   protected _scope: PouchScope = PouchScope.SINGLETON;
-  protected _qualifier: string | symbol = undefined;
+  protected _qualifier: PropertyType = undefined;
   protected _postConstruct: Set<string> = undefined;
   protected _preDestroy: Set<string> = undefined;
 
-  public constructor(type: Object) {
-    this._type = type;
+  public constructor(clazz: ClassType) {
+    this._clazz = clazz;
     this._stereotype = InjectableSterotype.INJECTABLE;
   }
 
-  public get Type(): Object {
-      return this._type;
+  public get Clazz(): ClassType {
+      return this._clazz;
   }
 
   public get Stereotype(): InjectableSterotype {
@@ -34,11 +35,11 @@ class InjectableDefinition implements PouchDefinition {
     this._scope = scope;
   }
 
-  public get Qualifier(): string | symbol {
+  public get Qualifier(): PropertyType {
       return this._qualifier;
   }
 
-  public set Qualifier(qualifier: string | symbol) {
+  public set Qualifier(qualifier: PropertyType) {
     this._qualifier = qualifier;
   }
 
diff --git a/src/ts/@loafer/context/implement/DefaultAppContext.ts b/src/ts/@loafer/context/implement/DefaultAppContext.ts
index 2d3546c..cbe3adb 100644
--- a/src/ts/@loafer/context/implement/DefaultAppContext.ts
+++ b/src/ts/@loafer/context/implement/DefaultAppContext.ts
@@ -1,5 +1,6 @@
 import {
-  Construtorable,
+  ClassType,
+  PropertyType,
 } from '@loafer/core/constants';
 
 import AppContext from '@loafer/context/AppContext';
@@ -17,12 +18,11 @@ class DefaultAppContext implements AppContext {
     return this.pouchFactory;
   }
 
-  public getPouch<T>(type: Construtorable<T>, ...args: any[]): T {
-    return this.pouchFactory.getPouch(type, args);
+  public getPouch(qualifier: PropertyType, clazz: ClassType, ...args: any[]): any {
+    return this.pouchFactory.getPouch(qualifier, clazz, args);
   }
-
-  public getPouchByQualifier<T>(type: Construtorable<T>, qualifier: string | symbol, ...args: any[]): T {
-    return this.pouchFactory.getPouchByQualifier(type, qualifier, args);
+  public getPouchByType(clazz: ClassType, qualifier: PropertyType, ...args: any[]): any {
+    return this.pouchFactory.getPouchByType(clazz, qualifier, args);
   }
 
 }
diff --git a/src/ts/@loafer/context/util/metadata/configuration.ts b/src/ts/@loafer/context/util/metadata/configuration.ts
index 8fd103e..8ec949f 100644
--- a/src/ts/@loafer/context/util/metadata/configuration.ts
+++ b/src/ts/@loafer/context/util/metadata/configuration.ts
@@ -1,6 +1,7 @@
+import { ClassType } from '@loafer/core/constants';
 import getClassMetadata from '@loafer/core/util/metadata/getClassMetadata';
 import { CONTEXT_INJECTABLE_DEFINITION } from '@loafer/context/constants';
 import ConfigurationDefinition from '@loafer/context/definition/ConfigurationDefinition';
 
-export const getConfigurationDefinition = (target: Object, isCreate: boolean = false) =>
-  getClassMetadata(target, CONTEXT_INJECTABLE_DEFINITION, ConfigurationDefinition, isCreate);
+export const getConfigurationDefinition = (clazz: ClassType, isCreate: boolean = false) =>
+  getClassMetadata(clazz, CONTEXT_INJECTABLE_DEFINITION, ConfigurationDefinition, isCreate);
diff --git a/src/ts/@loafer/context/util/metadata/injectable.ts b/src/ts/@loafer/context/util/metadata/injectable.ts
index 1b3ac63..73e5ddc 100644
--- a/src/ts/@loafer/context/util/metadata/injectable.ts
+++ b/src/ts/@loafer/context/util/metadata/injectable.ts
@@ -1,6 +1,7 @@
+import { ClassType } from '@loafer/core/constants';
 import getClassMetadata from '@loafer/core/util/metadata/getClassMetadata';
 import { CONTEXT_INJECTABLE_DEFINITION } from '@loafer/context/constants';
 import InjectableDefinition from '@loafer/context/definition/InjectableDefinition';
 
-export const getInjectableDefinition = (target: Object, isCreate: boolean = false) =>
-  getClassMetadata(target, CONTEXT_INJECTABLE_DEFINITION, InjectableDefinition, isCreate);
+export const getInjectableDefinition = (clazz: ClassType, isCreate: boolean = false) =>
+  getClassMetadata(clazz, CONTEXT_INJECTABLE_DEFINITION, InjectableDefinition, isCreate);
diff --git a/src/ts/@loafer/core/constants/types.ts b/src/ts/@loafer/core/constants/types.ts
index da78154..6bc3e07 100644
--- a/src/ts/@loafer/core/constants/types.ts
+++ b/src/ts/@loafer/core/constants/types.ts
@@ -1,4 +1,6 @@
 export type Construtorable<T> = {new(...args: any[]): T};
+export type ClassType = Object;
+export type PropertyType = string | symbol;
 
 export enum DecoratorType {
   CLASS,
diff --git a/src/ts/@loafer/core/util/metadata/getClassMetadata.ts b/src/ts/@loafer/core/util/metadata/getClassMetadata.ts
index 838e934..765709d 100644
--- a/src/ts/@loafer/core/util/metadata/getClassMetadata.ts
+++ b/src/ts/@loafer/core/util/metadata/getClassMetadata.ts
@@ -1,21 +1,25 @@
-export type MetadataDefinable<T> = {new(target: Function): T};
+import {
+  ClassType,
+} from '@loafer/core/constants';
 
-const getClassMetadata = <DefinitionType>(target: Object,
+export type MetadataDefinable<T> = {new(clazz: ClassType): T};
+
+const getClassMetadata = <DefinitionType>(clazz: ClassType,
                                           metadataKey: any,
                                           definitionType: MetadataDefinable<DefinitionType>,
                                           isCreate: boolean = false): DefinitionType => {
 
   let definition: DefinitionType;
-  if (Reflect.hasOwnMetadata(metadataKey, target) !== true) {
+  if (Reflect.hasOwnMetadata(metadataKey, clazz) !== true) {
       if (!isCreate) {
           return undefined;
       }
       definition = Object.create(definitionType.prototype);
-      definition.constructor.call(definition, target);
+      definition.constructor.call(definition, clazz);
 
-      Reflect.defineMetadata(metadataKey, definition, target);
+      Reflect.defineMetadata(metadataKey, definition, clazz);
   } else {
-    definition = Reflect.getMetadata(metadataKey, target);
+    definition = Reflect.getMetadata(metadataKey, clazz);
   }
   return definition;
 };
diff --git a/src/ts/@loafer/pouches/decorator/InjectConfig.ts b/src/ts/@loafer/pouches/decorator/InjectConfig.ts
index fe4b687..8b83b22 100644
--- a/src/ts/@loafer/pouches/decorator/InjectConfig.ts
+++ b/src/ts/@loafer/pouches/decorator/InjectConfig.ts
@@ -1,7 +1,9 @@
+import { ClassType, PropertyType } from '@loafer/core/constants';
+
 interface InjectConfig {
-  qualifier?: string | symbol;
+  qualifier?: PropertyType;
   required?: boolean;
-  type?: any;
+  clazz?: ClassType;
 }
 
 export default InjectConfig;
diff --git a/src/ts/@loafer/pouches/definition/InjectDefinition.ts b/src/ts/@loafer/pouches/definition/InjectDefinition.ts
index f6caf12..f63a454 100644
--- a/src/ts/@loafer/pouches/definition/InjectDefinition.ts
+++ b/src/ts/@loafer/pouches/definition/InjectDefinition.ts
@@ -1,33 +1,39 @@
+import {
+  ClassType,
+  DecoratorType,
+  DESIGN_PARAMTYPES,
+  DESIGN_TYPE,
+  PropertyType,
+} from '@loafer/core/constants';
 import { InjectSterotype } from '@loafer/pouches/constants';
 import { validateQualifier } from '@loafer/pouches/util/qualifier';
 import InjectConfig from '@loafer/pouches/decorator/InjectConfig';
-import * as CoreConstants from '@loafer/core/constants';
 
 export interface InjectItem {
   stereotype: InjectSterotype;
-  decoratorType: CoreConstants.DecoratorType;
+  decoratorType: DecoratorType;
   propertyConfig?: InjectConfig;
   parameterConfigMap?: Map<number, InjectConfig>;
 }
 
 class InjectDefinition {
-  protected target: Object;
-  protected injectMap: Map<string | symbol, InjectItem>;
+  protected clazz: ClassType;
+  protected injectMap: Map<PropertyType, InjectItem>;
 
-  public constructor(target: Object) {
-    this.target = target;
+  public constructor(clazz: ClassType) {
+    this.clazz = clazz;
     this.injectMap = new Map();
   }
 
-  public get injectors(): Map<string | symbol, InjectItem> {
+  public get injectors(): Map<PropertyType, InjectItem> {
     return this.injectMap;
   }
 
   /**
    * addInject
    */
-  public addInject(injectConfig: InjectConfig, propertyKey: string | symbol, parameterIndex?: number): void {
-    injectConfig.qualifier = validateQualifier(this.target, injectConfig.qualifier);
+  public addInject(injectConfig: InjectConfig, propertyKey: PropertyType, parameterIndex?: number): void {
+    injectConfig.qualifier = validateQualifier(this.clazz, injectConfig.qualifier);
     if (undefined === injectConfig.required) {
       injectConfig.required = false;
     }
@@ -42,7 +48,7 @@ class InjectDefinition {
   /**
    * addValue
    */
-  public addValue(value: string, propertyKey: string | symbol, parameterIndex?: number): void {
+  public addValue(value: string, propertyKey: PropertyType, parameterIndex?: number): void {
     if(typeof parameterIndex === 'number') {
       this.addValueParameter(value, propertyKey, parameterIndex);
     } else {
@@ -50,22 +56,22 @@ class InjectDefinition {
     }
   }
 
-  private addValueProperty(value: string, propertyKey: string | symbol): void {
+  private addValueProperty(value: string, propertyKey: PropertyType): void {
     return;
   }
-  private addValueParameter(value: string, propertyKey: string | symbol, parameterIndex: number): void {
+  private addValueParameter(value: string, propertyKey: PropertyType, parameterIndex: number): void {
     return;
   }
 
 
 
   private addInjectParameter(injectConfig: InjectConfig,
-                             propertyKey: string | symbol, parameterIndex: number): void {
+                             propertyKey: PropertyType, parameterIndex: number): void {
     let injectItem: InjectItem;
-    let parameterTypes: any[] = Reflect.getMetadata(CoreConstants.DESIGN_PARAMTYPES, this.target, propertyKey);
+    let parameterTypes: any[] = Reflect.getMetadata(DESIGN_PARAMTYPES, this.clazz, propertyKey);
 
-    if (undefined === injectConfig.type) {
-      injectConfig.type = parameterTypes[parameterIndex];
+    if (undefined === injectConfig.clazz) {
+      injectConfig.clazz = parameterTypes[parameterIndex];
     }
 
     if (this.injectMap.has(propertyKey)) {
@@ -73,7 +79,7 @@ class InjectDefinition {
     } else {
       injectItem = {
         stereotype: InjectSterotype.INJECT,
-        decoratorType: CoreConstants.DecoratorType.PARAMETER,
+        decoratorType: DecoratorType.PARAMETER,
       };
       this.injectMap.set(propertyKey, injectItem);
     }
@@ -90,20 +96,20 @@ class InjectDefinition {
 
   }
 
-  private addInjectProperty(injectConfig: InjectConfig, propertyKey: string | symbol): void {
+  private addInjectProperty(injectConfig: InjectConfig, propertyKey: PropertyType): void {
     if (this.injectMap.has(propertyKey)) {
       throw new Error(`Cannot apply @inject decorator on one property[${propertyKey}] multiple times.`);
     }
 
-    let propertyType: any = Reflect.getMetadata(CoreConstants.DESIGN_TYPE, this.target, propertyKey);
+    let propertyType: any = Reflect.getMetadata(DESIGN_TYPE, this.clazz, propertyKey);
 
-    if (undefined === injectConfig.type) {
-      injectConfig.type = propertyType;
+    if (undefined === injectConfig.clazz) {
+      injectConfig.clazz = propertyType;
     }
 
     let injectItem: InjectItem = {
       stereotype: InjectSterotype.INJECT,
-      decoratorType: CoreConstants.DecoratorType.PROPERTY,
+      decoratorType: DecoratorType.PROPERTY,
       propertyConfig: injectConfig,
     };
 
diff --git a/src/ts/@loafer/pouches/factory/PouchFactory.ts b/src/ts/@loafer/pouches/factory/PouchFactory.ts
index f5c6abf..3cbba9c 100644
--- a/src/ts/@loafer/pouches/factory/PouchFactory.ts
+++ b/src/ts/@loafer/pouches/factory/PouchFactory.ts
@@ -1,8 +1,23 @@
-import { Construtorable } from '@loafer/core/constants';
+import {
+  ClassType,
+  PropertyType,
+} from '@loafer/core/constants';
 
 interface PouchFactory {
-  getPouch<T>(type: Construtorable<T>, ...args: any[]): T;
-  getPouchByQualifier<T>(type: Construtorable<T>, qualifier: string | symbol, ...args: any[]): T;
+  /**
+   * @param qualifier is identity of pouch
+   * @param clazz is type of pouch (if clazz is not specified, set the undefined)
+   * @param args are argument of target constructor
+   * @returns an instance of pouch
+   */
+  getPouch(qualifier: PropertyType, clazz: ClassType, ...args: any[]): any;
+  /**
+   * @param clazz is type of pouch
+   * @param qualifier is identity of pouch (if qualifier is not specified, set the undefined)
+   * @param args are argument of target constructor
+   * @returns an instance of pouch
+   */
+  getPouchByType(clazz: ClassType, qualifier: PropertyType, ...args: any[]): any;
 
 }
 
diff --git a/src/ts/@loafer/pouches/factory/config/PouchDefinition.ts b/src/ts/@loafer/pouches/factory/config/PouchDefinition.ts
index 5d9e1e4..b1efebf 100644
--- a/src/ts/@loafer/pouches/factory/config/PouchDefinition.ts
+++ b/src/ts/@loafer/pouches/factory/config/PouchDefinition.ts
@@ -1,10 +1,11 @@
+import { ClassType, PropertyType } from '@loafer/core/constants';
 import { InjectableSterotype, PouchScope } from '@loafer/pouches/constants';
 
 interface PouchDefinition {
-  readonly Type: Object;
+  readonly Clazz: ClassType;
   Stereotype: InjectableSterotype;
   Scope: PouchScope;
-  Qualifier: string | symbol;
+  Qualifier: PropertyType;
   readonly PostConstruct: Set<string>;
   readonly PreDestroy: Set<string>;
   addPostConstruct(postConstruct: string): void;
diff --git a/src/ts/@loafer/pouches/factory/config/SingletonPouchRegistry.ts b/src/ts/@loafer/pouches/factory/config/SingletonPouchRegistry.ts
index a6c9848..786deae 100644
--- a/src/ts/@loafer/pouches/factory/config/SingletonPouchRegistry.ts
+++ b/src/ts/@loafer/pouches/factory/config/SingletonPouchRegistry.ts
@@ -1,11 +1,14 @@
 import {
-  Construtorable,
+  ClassType,
+  PropertyType,
 } from '@loafer/core/constants';
 
 interface SingletonPouchRegistry {
-  registerSingleton(pouch: any, qualifier?: string | symbol): void;
-  getSingleton<T>(type: Construtorable<T>, qualifier?: string | symbol): T;
-  hasSingleton<T>(type: Construtorable<T>, qualifier?: string | symbol): boolean;
+  registerSingleton(pouch: any, qualifier?: PropertyType): void;
+  getSingleton(qualifier: PropertyType, clazz?: ClassType): any;
+  getSingletonByClass(clazz: ClassType, qualifier?: PropertyType): any;
+  hasSingleton(qualifier: PropertyType, clazz?: ClassType): boolean;
+  hasSingletonByClass(clazz: ClassType, qualifier?: PropertyType): boolean;
 }
 
 export default SingletonPouchRegistry;
diff --git a/src/ts/@loafer/pouches/factory/implement/AbstractPouchFactory.ts b/src/ts/@loafer/pouches/factory/implement/AbstractPouchFactory.ts
index 56920cc..509984a 100644
--- a/src/ts/@loafer/pouches/factory/implement/AbstractPouchFactory.ts
+++ b/src/ts/@loafer/pouches/factory/implement/AbstractPouchFactory.ts
@@ -1,3 +1,8 @@
+import {
+  ClassType,
+  PropertyType,
+} from '@loafer/core/constants';
+
 import {
   validateQualifier,
 } from '@loafer/pouches/util/qualifier';
@@ -9,46 +14,46 @@ import DefaultSingletonPouchRegistry from '@loafer/pouches/factory/implement/Def
 
 
 abstract class AbstractPouchFactory extends DefaultSingletonPouchRegistry implements PouchDefinitionRegistry {
-  protected pouchDefinitionMap: Map<string | symbol, Map<Object, PouchDefinition>>;
+  protected pouchDefinitionMap: Map<PropertyType, Map<ClassType, PouchDefinition>>;
   public constructor() {
     super();
     this.pouchDefinitionMap = new Map();
   }
 
   public registerPouchDefinition(pouchDefinition: PouchDefinition): void {
-    let type = pouchDefinition.Type;
-    let qualifier = validateQualifier(type, pouchDefinition.Qualifier);
+    let clazz = pouchDefinition.Clazz;
+    let qualifier = validateQualifier(clazz, pouchDefinition.Qualifier);
 
-    if (this.hasPouchDefinition(type, qualifier)) {
-      throw new Error(`Pouch Definition[${type.constructor.name}:${qualifier}] is exist already`);
+    if (this.hasPouchDefinition(clazz, qualifier)) {
+      throw new Error(`Pouch Definition[${clazz.constructor.name}:${qualifier}] is exist already`);
     }
     let map = this.pouchDefinitionMap.get(qualifier);
     if (undefined === map) {
       map = new Map();
       this.pouchDefinitionMap.set(qualifier, map);
     }
-    map.set(type, pouchDefinition);
+    map.set(clazz, pouchDefinition);
   }
-  public removePouchDefinition(type: Object, qualifier?: string | symbol): void {
-    const _qualifier = validateQualifier(type, qualifier);
-    if (!this.hasPouchDefinition(type, _qualifier)) {
-      throw new Error(`Pouch Definition[${type.constructor.name}:${qualifier}] is not exist`);
+  public removePouchDefinition(clazz: ClassType, qualifier?: PropertyType): void {
+    const _qualifier = validateQualifier(clazz, qualifier);
+    if (!this.hasPouchDefinition(clazz, _qualifier)) {
+      throw new Error(`Pouch Definition[${clazz.constructor.name}:${qualifier}] is not exist`);
     }
-    this.pouchDefinitionMap.get(_qualifier).delete(type);
+    this.pouchDefinitionMap.get(_qualifier).delete(clazz);
     if (0 === this.pouchDefinitionMap.get(_qualifier).size) {
       this.pouchDefinitionMap.delete(_qualifier);
     }
   }
-  public getPouchDefinition(type: Object, qualifier?: string | symbol): PouchDefinition {
-    const _qualifier = validateQualifier(type, qualifier);
+  public getPouchDefinition(clazz: ClassType, qualifier?: PropertyType): PouchDefinition {
+    const _qualifier = validateQualifier(clazz, qualifier);
 
     if (!this.pouchDefinitionMap.has(_qualifier)) {
       return undefined;
     }
-    return this.pouchDefinitionMap.get(_qualifier).get(type);
+    return this.pouchDefinitionMap.get(_qualifier).get(clazz);
   }
-  public hasPouchDefinition(type: Object, qualifier?: string | symbol): boolean {
-    return undefined === this.getPouchDefinition(type, qualifier) ? false : true;
+  public hasPouchDefinition(clazz: ClassType, qualifier?: PropertyType): boolean {
+    return undefined === this.getPouchDefinition(clazz, qualifier) ? false : true;
   }
 
 
diff --git a/src/ts/@loafer/pouches/factory/implement/DefaultPouchFactory.ts b/src/ts/@loafer/pouches/factory/implement/DefaultPouchFactory.ts
index ce8cc5c..3ce0931 100644
--- a/src/ts/@loafer/pouches/factory/implement/DefaultPouchFactory.ts
+++ b/src/ts/@loafer/pouches/factory/implement/DefaultPouchFactory.ts
@@ -1,6 +1,7 @@
 import {
-  Construtorable,
+  ClassType,
   DecoratorType,
+  PropertyType,
 } from '@loafer/core/constants';
 
 import {
@@ -19,19 +20,16 @@ class DefaultPouchFactory extends AbstractPouchFactory implements PouchFactory,
   public constructor() {
     super();
   }
+  public getPouch(qualifier: PropertyType, clazz: ClassType, ...args: any[]): any {
 
-  public getPouch<T>(type: Construtorable<T>, ...args: any[]): T {
-    let qualifier = validateQualifier(type.prototype, undefined);
-    return this.getPouchByQualifier(type, qualifier, args);
+    return null;
   }
+  public getPouchByType(clazz: ClassType, qualifier: PropertyType, ...args: any[]): any {
+    let _qualifier = validateQualifier(clazz, qualifier);
 
-  public getPouchByQualifier<T>(type: Construtorable<T>, qualifier: string | symbol, ...args: any[]): T {
-    let clazz: Function = type.prototype;
-    let instance: T;
-    return instance;
+    return null;
   }
 
-
 }
 
 export default DefaultPouchFactory;
diff --git a/src/ts/@loafer/pouches/factory/implement/DefaultSingletonPouchRegistry.ts b/src/ts/@loafer/pouches/factory/implement/DefaultSingletonPouchRegistry.ts
index 4fe399f..5b3bbf4 100644
--- a/src/ts/@loafer/pouches/factory/implement/DefaultSingletonPouchRegistry.ts
+++ b/src/ts/@loafer/pouches/factory/implement/DefaultSingletonPouchRegistry.ts
@@ -1,5 +1,6 @@
 import {
-  Construtorable,
+  ClassType,
+  PropertyType,
 } from '@loafer/core/constants';
 
 import SingletonPouchRegistry from '@loafer/pouches/factory/config/SingletonPouchRegistry';
@@ -9,44 +10,71 @@ import {
 } from '@loafer/pouches/util/qualifier';
 
 class DefaultSingletonPouchRegistry implements SingletonPouchRegistry {
-  protected singletonInstanceMap: Map<string | symbol, Map<Object, any>>;
+  protected singletonInstanceMap: Map<PropertyType, Map<ClassType, any>>;
 
   protected constructor() {
   }
 
-  public registerSingleton(pouch: any, qualifier?: string | symbol): void {
-    let type: Object = Object.getPrototypeOf(pouch);
-    const _qualifier = validateQualifier(type, qualifier);
+  public registerSingleton(pouch: any, qualifier?: PropertyType): void {
+    let clazz: ClassType = Object.getPrototypeOf(pouch);
+    const _qualifier = validateQualifier(clazz, qualifier);
 
-    if (this._hasSingleton(type, _qualifier)) {
-      throw new Error(`Pouch Definition[${type.constructor.name}:${qualifier}] is exist already`);
+    if (this._hasSingleton(_qualifier, clazz)) {
+      throw new Error(`Pouch Definition[${clazz.constructor.name}:${qualifier}] is exist already`);
     }
     let map = this.singletonInstanceMap.get(_qualifier);
     if (undefined === map) {
       map = new Map();
       this.singletonInstanceMap.set(_qualifier, map);
     }
-    map.set(type, pouch);
-  }
-  public getSingleton<T>(target: Construtorable<T>, qualifier?: string | symbol): T {
-    let type = target.prototype;
-    return this._getSingleton(type, qualifier);
-  }
-  public hasSingleton<T>(target: Construtorable<T>, qualifier?: string | symbol): boolean {
-    return this._hasSingleton(target.prototype, qualifier);
+    map.set(clazz, pouch);
   }
 
-  private _getSingleton<T>(type: Object, qualifier?: string | symbol): T {
-    const _qualifier = validateQualifier(type, qualifier);
+  public getSingleton(qualifier: PropertyType, clazz?: ClassType): any {
+    return this._getSingleton(qualifier, clazz);
+  }
+  public getSingletonByClass(clazz: ClassType, qualifier?: PropertyType): any {
+    const _qualifier = validateQualifier(clazz, qualifier);
+    return this._getSingleton(_qualifier, clazz);
+  }
+  public hasSingleton(qualifier: PropertyType, clazz?: ClassType): boolean {
+    return this._hasSingleton(qualifier, clazz);
+  }
+  public hasSingletonByClass(clazz: ClassType, qualifier?: PropertyType): boolean {
+    const _qualifier = validateQualifier(clazz, qualifier);
+    return this._hasSingleton(_qualifier, clazz);
+  }
 
-    if (!this.singletonInstanceMap.has(_qualifier)) {
+
+  private _getSingleton<T>(qualifier: PropertyType, clazz?: ClassType): T {
+    if (!this.singletonInstanceMap.has(qualifier)) {
       return undefined;
     }
-    return this.singletonInstanceMap.get(_qualifier).get(type);
+    let map = this.singletonInstanceMap.get(qualifier);
+    let instance;
+    try {
+      instance = this._getInstance(map, clazz);
+    } catch(e) {
+      throw new Error(`Type of Pouch[${qualifier}] cannot be specified(count is ${map.size}).`);
+    }
+    return instance;
   }
 
-  private _hasSingleton(type: Object, qualifier?: string | symbol): boolean {
-    return undefined === this._getSingleton(type, qualifier) ? false : true;
+  private _hasSingleton(qualifier: PropertyType, clazz?: ClassType): boolean {
+    return undefined === this._getSingleton(qualifier, clazz) ? false : true;
+  }
+
+  private _getInstance(map: Map<ClassType, any>, clazz?: ClassType): any {
+    if (undefined !== clazz) {
+      return map.get(clazz);
+    }
+    const count = map.size;
+    if (1 < count) {
+      throw new Error(`Type of Pouch cannot be specified(count is ${count}).`);
+    }
+    for (let value of Array.from(map.values())) {
+      return value;
+    }
   }
 }
 
diff --git a/src/ts/@loafer/pouches/factory/registry/PouchDefinitionRegistry.ts b/src/ts/@loafer/pouches/factory/registry/PouchDefinitionRegistry.ts
index cd822d2..a815daa 100644
--- a/src/ts/@loafer/pouches/factory/registry/PouchDefinitionRegistry.ts
+++ b/src/ts/@loafer/pouches/factory/registry/PouchDefinitionRegistry.ts
@@ -1,11 +1,15 @@
-import { Construtorable } from '@loafer/core/constants';
+import {
+  ClassType,
+  PropertyType,
+} from '@loafer/core/constants';
+
 import PouchDefinition from '@loafer/pouches/factory/config/PouchDefinition';
 
 interface PouchDefinitionRegistry {
   registerPouchDefinition(pouchDefinition: PouchDefinition): void;
-  removePouchDefinition(type: Object, qualifier?: string | symbol): void;
-  getPouchDefinition(type: Object, qualifier?: string | symbol): PouchDefinition;
-  hasPouchDefinition(type: Object, qualifier?: string | symbol): boolean;
+  removePouchDefinition(clazz: ClassType, qualifier?: PropertyType): void;
+  getPouchDefinition(clazz: ClassType, qualifier?: PropertyType): PouchDefinition;
+  hasPouchDefinition(clazz: ClassType, qualifier?: PropertyType): boolean;
 }
 
 export default PouchDefinitionRegistry;
diff --git a/src/ts/@loafer/pouches/util/metadata/inject.ts b/src/ts/@loafer/pouches/util/metadata/inject.ts
index 7072436..8f5ce90 100644
--- a/src/ts/@loafer/pouches/util/metadata/inject.ts
+++ b/src/ts/@loafer/pouches/util/metadata/inject.ts
@@ -1,8 +1,9 @@
+import { ClassType } from '@loafer/core/constants';
 import getClassMetadata from '@loafer/core/util/metadata/getClassMetadata';
 
 import { POUCH_INJECT_DEFINITION } from '@loafer/pouches/constants';
 import InjectDefinition from '@loafer/pouches/definition/InjectDefinition';
 
 export const getInjectDefinition =
-  (target: Object, isCreate: boolean = false) =>
-    getClassMetadata(target, POUCH_INJECT_DEFINITION, InjectDefinition, isCreate);
+  (clazz: ClassType, isCreate: boolean = false) =>
+    getClassMetadata(clazz, POUCH_INJECT_DEFINITION, InjectDefinition, isCreate);
diff --git a/src/ts/@loafer/pouches/util/qualifier.ts b/src/ts/@loafer/pouches/util/qualifier.ts
index 98a4beb..0ce7d50 100644
--- a/src/ts/@loafer/pouches/util/qualifier.ts
+++ b/src/ts/@loafer/pouches/util/qualifier.ts
@@ -1,3 +1,8 @@
-export const validateQualifier = (type: Object, qualifier: string | symbol) => {
-  return undefined === qualifier ? type.constructor.name : qualifier;
+import {
+  ClassType,
+  PropertyType,
+} from '@loafer/core/constants';
+
+export const validateQualifier = (clazz: ClassType, qualifier: PropertyType) => {
+  return undefined === qualifier ? clazz.constructor.name : qualifier;
 };