diff --git a/crawler/crawler.go b/crawler/crawler.go
index 74508d0..9daba60 100644
--- a/crawler/crawler.go
+++ b/crawler/crawler.go
@@ -2,7 +2,6 @@ package crawler
 
 import (
 	"bytes"
-	"encoding/json"
 	"git.loafle.net/overflow/ssh_crawler/ssh"
 	"git.loafle.net/overflow/ssh_crawler/stat"
 )
@@ -41,11 +40,7 @@ func (c *Crawler) CPUStat(ch chan interface{}, keys []string) {
 		if err != nil {
 			ch <- err
 		}
-		jsonData, err := json.Marshal(res)
-		if err != nil {
-			ch <- err
-		}
-		ch <- string(jsonData)
+		ch <- res
 		close(ch)
 	}()
 }
@@ -61,16 +56,12 @@ func (c *Crawler) MemStat(ch chan interface{}, keys []string) {
 		if err != nil {
 			ch <- err
 		}
-		jsonData, err := json.Marshal(res)
-		if err != nil {
-			ch <- err
-		}
-		ch <- string(jsonData)
+		ch <- res
 		close(ch)
 	}()
 }
 
-func (c *Crawler) DiskIOStat(ch chan interface{}) {
+func (c *Crawler) DiskIOStat(ch chan interface{}, keys []string) {
 	go func() {
 		diskio := &stat.DiskIOStat{}
 
@@ -79,7 +70,7 @@ func (c *Crawler) DiskIOStat(ch chan interface{}) {
 			ch <- err
 		}
 
-		res, err := diskio.Parse(bytes.NewReader(b))
+		res, err := diskio.Read(bytes.NewReader(b), keys)
 		if err != nil {
 			ch <- err
 		}
@@ -88,14 +79,14 @@ func (c *Crawler) DiskIOStat(ch chan interface{}) {
 	}()
 }
 
-func (c *Crawler) DiskFreeStat(ch chan interface{}) {
+func (c *Crawler) DiskFreeStat(ch chan interface{}, keys []string) {
 	go func() {
 		diskFree := &stat.DiskFreeStat{}
 		b, err := c.sshCli.RunCommand(diskFree.Command())
 		if err != nil {
 			ch <- err
 		}
-		res, err := diskFree.Parse(bytes.NewReader(b))
+		res, err := diskFree.Read(bytes.NewReader(b), keys)
 		if err != nil {
 			ch <- err
 		}
@@ -112,7 +103,7 @@ func (c *Crawler) LoadAvgStat(ch chan interface{}) {
 		if err != nil {
 			ch <- err
 		}
-		res, err := load.Parse(bytes.NewReader(b))
+		res, err := load.Read(bytes.NewReader(b))
 		if err != nil {
 			ch <- err
 		}
@@ -120,14 +111,14 @@ func (c *Crawler) LoadAvgStat(ch chan interface{}) {
 	}()
 }
 
-func (c *Crawler) NetworkStat(ch chan interface{}) {
+func (c *Crawler) NetworkStat(ch chan interface{}, keys []string) {
 	go func() {
 		net := &stat.NetDevStat{}
 		b, err := c.sshCli.RunCommand(net.Command())
 		if err != nil {
 			ch <- err
 		}
-		res, err := net.Parse(bytes.NewReader(b))
+		res, err := net.Read(bytes.NewReader(b), keys)
 		if err != nil {
 			ch <- err
 		}
@@ -142,7 +133,7 @@ func (c *Crawler) ProcessStat(ch chan interface{}) {
 		if err != nil {
 			ch <- err
 		}
-		res, err := ps.Parse(bytes.NewReader(b))
+		res, err := ps.Read(bytes.NewReader(b))
 		if err != nil {
 			ch <- err
 		}
diff --git a/main.go b/main.go
index 5e55c5b..51e0cb7 100644
--- a/main.go
+++ b/main.go
@@ -3,6 +3,7 @@ package main
 import (
 	"fmt"
 	"git.loafle.net/overflow/ssh_crawler/crawler"
+	"encoding/json"
 )
 
 func main() {
@@ -17,7 +18,6 @@ func main() {
 		fmt.Println(err)
 	}
 
-	//사용자가 cpu.usage.total을 선택했을 때의 수집항목들 (..출력 항목도 포함시켜서 계산결과 리턴해야하나?)
 	cpukeys := []string{
 		"cpu.usage.sum",
 		"cpu.usage.user",
@@ -29,11 +29,11 @@ func main() {
 		"cpu.usage.softirq",
 		"cpu.usage.steal",
 		"cpu.usage.guest",
-		"cpu.usage.guestNice",
+		"cpu.usage.gnice",
 	}
 	cpuCh := make(chan interface{})
 	cr.CPUStat(cpuCh, cpukeys)
-	fmt.Println(<-cpuCh)
+	print(<-cpuCh)
 
 	//Memory
 	memkeys := []string {
@@ -48,39 +48,93 @@ func main() {
 	}
 	memCh := make(chan interface{})
 	cr.MemStat(memCh, memkeys)
-	fmt.Println(<-memCh)
+	print(<-memCh)
 
-	//memCh := make(chan interface{})
-	//cr.MemStat(memCh, keys)
-	//fmt.Println(<-memCh)
+	//Disk IO
+	ioKeys := []string {
+		"disk[0].io.device",
+		"disk[0].io.readcnt",
+		"disk[0].io.merged_readcnt",
+		"disk[0].io.readbytes",
+		"disk[0].io.readtime",
+		"disk[0].io.writecnt",
+		"disk[0].io.merged_writecnt",
+		"disk[0].io.writebytes",
+		"disk[0].io.writetime",
+		"disk[0].io.iotime",
+		"disk[0].io.weighted",
 
-	////Memory
-	//memCh := make(chan interface{})
-	//cr.MemStat(memCh)
-	//fmt.Println(<-memCh)
-	//
-	////Disk IO
-	//diskioCh := make(chan interface{})
-	//cr.DiskIOStat(diskioCh)
-	//fmt.Println(<-diskioCh)
-	//
-	////Disk Free
-	//diskFreeCh := make(chan interface{})
-	//cr.DiskFreeStat(diskFreeCh)
-	//fmt.Println(<-diskFreeCh)
-	//
-	////Network
-	//netCh := make(chan interface{})
-	//cr.NetworkStat(netCh)
-	//fmt.Println(<-netCh)
-	//
-	////Load Avg.
-	//loadCh := make(chan interface{})
-	//cr.LoadAvgStat(loadCh)
-	//fmt.Println(<-loadCh)
-	//
-	////Process
-	//psCh := make(chan interface{})
-	//cr.ProcessStat(psCh)
-	//fmt.Println(<-psCh)
+		"disk[1].io.readcnt",
+		"disk[2].io.merged_readcnt",
+		"disk[3].io.readbytes",
+		"disk[4].io.readtime",
+	}
+	diskioCh := make(chan interface{})
+	cr.DiskIOStat(diskioCh, ioKeys)
+	print(<-diskioCh)
+
+
+	//Disk Free
+	diskFreekeys := []string {
+		"disk[0].usage.fs",
+		"disk[0].usage.used",
+		"disk[0].usage.available",
+		"disk[0].usage.usedperc",
+		"disk[0].usage.mounted",
+
+		"disk[1].usage.fs",
+		"disk[2].usage.fs",
+	}
+	diskFreeCh := make(chan interface{})
+	cr.DiskFreeStat(diskFreeCh, diskFreekeys)
+	print(<-diskFreeCh)
+
+
+
+	//Network
+	netKeys := []string {
+		"net[14].transfer.iface",
+		"net[14].transfer.recv_byte",
+		"net[14].transfer.recv_packet",
+		"net[14].transfer.recv_err",
+		"net[14].transfer.recv_drop",
+		"net[14].transfer.recv_fifo",
+		"net[14].transfer.recv_frame",
+		"net[14].transfer.recv_compressed",
+		"net[14].transfer.recv_multicast",
+		"net[14].transfer.send_byte",
+		"net[14].transfer.send_packet",
+		"net[14].transfer.send_err",
+		"net[14].transfer.send_drop",
+		"net[14].transfer.send_fifo",
+		"net[14].transfer.send_frame",
+		"net[14].transfer.send_compressed",
+		"net[14].transfer.send_multicast",
+
+		"net[1].transfer.recv_packet",
+		"net[2].transfer.send_compressed",
+		"net[3].transfer.send_packet",
+	}
+	netCh := make(chan interface{})
+	cr.NetworkStat(netCh, netKeys)
+	print(<-netCh)
+
+
+	//Load Avg.
+	loadCh := make(chan interface{})
+	cr.LoadAvgStat(loadCh)
+	print(<-loadCh)
+
+
+	//Process
+	psCh := make(chan interface{})
+	cr.ProcessStat(psCh)
+	print(<-psCh)
+}
+
+func print(data interface{}) {
+	jsonData, err := json.Marshal(data)
+	if err != nil {
+	}
+	fmt.Println(string(jsonData))
 }
diff --git a/stat/cpu.go b/stat/cpu.go
index aaf9fe8..76a01eb 100644
--- a/stat/cpu.go
+++ b/stat/cpu.go
@@ -65,7 +65,7 @@ func (cpu CPUStat) Read(r io.Reader, keys []string) (*map[string]string, error)
 		})
 	}
 
-	res, err :=cpu.parse(keys, stats)
+	res, err := cpu.parse(keys, stats)
 	if err != nil {
 		return nil, err
 	}
diff --git a/stat/disk_free.go b/stat/disk_free.go
index 1ceaa57..28953e4 100644
--- a/stat/disk_free.go
+++ b/stat/disk_free.go
@@ -4,6 +4,8 @@ import (
 	"bufio"
 	"io"
 	"strings"
+	"strconv"
+	"git.loafle.net/overflow/ssh_crawler/util"
 )
 
 type DiskFreeStat struct {
@@ -19,7 +21,7 @@ func (diskFree DiskFreeStat) Command() string {
 	return "df -k"
 }
 
-func (diskio DiskFreeStat) Parse(r io.Reader) (*[]DiskFreeStat, error) {
+func (diskio DiskFreeStat) Read(r io.Reader, keys []string) (*map[string]string, error) {
 
 	var scanner = bufio.NewScanner(r)
 	var stats = []DiskFreeStat{}
@@ -37,7 +39,12 @@ func (diskio DiskFreeStat) Parse(r io.Reader) (*[]DiskFreeStat, error) {
 		})
 	}
 
-	return &stats, scanner.Err()
+	res, err := diskio.parse(keys, stats)
+	if err != nil {
+		return nil, err
+	}
+
+	return &res, scanner.Err()
 }
 
 func removePercUnit(str string) string {
@@ -47,3 +54,33 @@ func removePercUnit(str string) string {
 	str = str[:len(str)-1]
 	return str
 }
+
+
+func (diskio DiskFreeStat) parse(keys []string, data []DiskFreeStat) (map[string]string, error) {
+	resMap := make(map[string]string)
+
+	for _, key := range keys  {
+		t := strings.Split(key, ".")
+		suffix := t[len(t)-1]
+		ext := util.ExtractInBracket(key)
+		idx, _ := strconv.Atoi(ext)
+
+		switch suffix {
+		case "fs":
+			resMap[key] = data[idx].Filesystem
+		case "used":
+			resMap[key] = data[idx].Used
+		case "available":
+			resMap[key] = data[idx].Available
+		case "usedperc":
+			resMap[key] = data[idx].UsePerc
+		case "mounted":
+			resMap[key] = data[idx].MountedOn
+
+		default:
+
+		}
+	}
+
+	return resMap, nil
+}
\ No newline at end of file
diff --git a/stat/disk_io.go b/stat/disk_io.go
index 4e8268c..e1acb0c 100644
--- a/stat/disk_io.go
+++ b/stat/disk_io.go
@@ -5,6 +5,8 @@ import (
 	"fmt"
 	"io"
 	"strings"
+	"git.loafle.net/overflow/ssh_crawler/util"
+	"strconv"
 )
 
 type DiskIOStat struct {
@@ -26,7 +28,7 @@ func (diskio DiskIOStat) Command() string {
 	return "cat /proc/diskstats"
 }
 
-func (diskio DiskIOStat) Parse(r io.Reader) (*[]DiskIOStat, error) {
+func (diskio DiskIOStat) Read(r io.Reader, keys []string) (*map[string]string, error) {
 	var (
 		stats   = []DiskIOStat{}
 		scanner = bufio.NewScanner(r)
@@ -55,8 +57,52 @@ func (diskio DiskIOStat) Parse(r io.Reader) (*[]DiskIOStat, error) {
 			TimeSpentIO:         parts[12],
 			WeightedTimeSpentIO: parts[13],
 		})
-
 	}
 
-	return &stats, scanner.Err()
+	res, err :=diskio.parse(keys, stats)
+	if err != nil {
+		return nil, err
+	}
+
+
+	return &res, scanner.Err()
+}
+
+func (diskio DiskIOStat) parse(keys []string, data []DiskIOStat) (map[string]string, error) {
+	resMap := make(map[string]string)
+
+	for _, key := range keys  {
+		t := strings.Split(key, ".")
+		suffix := t[len(t)-1]
+		ext := util.ExtractInBracket(key)
+		idx, _ := strconv.Atoi(ext)
+		switch suffix {
+		case "device":
+			resMap[key] = data[idx].Device
+		case "readcnt":
+			resMap[key] = data[idx].ReadCompleted
+		case "merged_readcnt":
+			resMap[key] = data[idx].ReadMerged
+		case "readbytes":
+			resMap[key] = util.Float64ToString(util.StringToFloat64(data[idx].SectorRead) * 512)
+		case "readtime":
+			resMap[key] = data[idx].TimeSpentReading
+		case "writecnt":
+			resMap[key] = data[idx].WritesCompleted
+		case "merged_writecnt":
+			resMap[key] = data[idx].WritesMerged
+		case "writebytes":
+			resMap[key] = util.Float64ToString(util.StringToFloat64(data[idx].SectorsWritten) * 512)
+		case "writetime":
+			resMap[key] = data[idx].TimeSpentWriting
+		case "iotime":
+			resMap[key] = data[idx].TimeSpentIO
+		case "ioweighted":
+			resMap[key] = data[idx].WeightedTimeSpentIO
+		default:
+
+		}
+	}
+
+	return resMap, nil
 }
diff --git a/stat/loadavg.go b/stat/loadavg.go
index d415aff..21e6081 100644
--- a/stat/loadavg.go
+++ b/stat/loadavg.go
@@ -7,27 +7,25 @@ import (
 )
 
 type LoadAvg struct {
-	Min1,
-	Min5,
-	Min15 string
 }
 
 func (loadavg LoadAvg) Command() string {
 	return "cat /proc/loadavg"
 }
 
-func (loadavg LoadAvg) Parse(r io.Reader) (*LoadAvg, error) {
+func (loadavg LoadAvg) Read(r io.Reader) (*map[string]string, error) {
 	var (
 		scanner = bufio.NewScanner(r)
+		resMap = make(map[string]string)
 	)
 
-	load := LoadAvg{}
 	for scanner.Scan() {
 		line := scanner.Text()
 		parts := strings.Fields(line)
-		load.Min1 = parts[0]
-		load.Min5 = parts[1]
-		load.Min15 = parts[2]
+		resMap["cpu.load.avg1"] = parts[0]
+		resMap["cpu.load.avg5"]= parts[1]
+		resMap["cpu.load.avg15"] = parts[2]
 	}
-	return &load, scanner.Err()
+
+	return &resMap, scanner.Err()
 }
diff --git a/stat/network.go b/stat/network.go
index 7657a8a..8e6a830 100644
--- a/stat/network.go
+++ b/stat/network.go
@@ -6,6 +6,8 @@ import (
 	"io"
 	"regexp"
 	"strings"
+	"strconv"
+	"git.loafle.net/overflow/ssh_crawler/util"
 )
 
 type NetDevStat struct {
@@ -32,11 +34,11 @@ func (net *NetDevStat) Command() string {
 	return "cat /proc/net/dev"
 }
 
-func (net *NetDevStat) Parse(r io.Reader) (*[]NetDevStat, error) {
+func (net *NetDevStat) Read(r io.Reader, keys []string) (*map[string]string, error) {
 	var (
 		scanner            = bufio.NewScanner(r)
 		procNetDevFieldSep = regexp.MustCompile("[ :] *")
-		netDevStats        = []NetDevStat{}
+		stats        = []NetDevStat{}
 	)
 	scanner.Scan()
 	scanner.Scan()
@@ -55,7 +57,7 @@ func (net *NetDevStat) Parse(r io.Reader) (*[]NetDevStat, error) {
 		}
 
 		dev := parts[0][:len(parts[0])]
-		netDevStats = append(netDevStats, NetDevStat{
+		stats = append(stats, NetDevStat{
 			Iface:           dev,
 			RecvByte:        parts[1],
 			RecvPacket:      parts[2],
@@ -75,5 +77,63 @@ func (net *NetDevStat) Parse(r io.Reader) (*[]NetDevStat, error) {
 			TransMulticast:  parts[16],
 		})
 	}
-	return &netDevStats, scanner.Err()
+
+	res, err := net.parse(keys, stats)
+	if err != nil {
+		return nil, err
+	}
+
+	return &res, scanner.Err()
 }
+
+func (net *NetDevStat) parse(keys []string, data []NetDevStat) (map[string]string, error) {
+	resMap := make(map[string]string)
+
+	for _, key := range keys  {
+		t := strings.Split(key, ".")
+		suffix := t[len(t)-1]
+		ext := util.ExtractInBracket(key)
+		idx, _ := strconv.Atoi(ext)
+		switch suffix {
+		case "iface":
+			resMap[key] = data[idx].Iface
+		case "recv_byte":
+			resMap[key] = data[idx].RecvByte
+		case "recv_packet":
+			resMap[key] = data[idx].RecvPacket
+		case "recv_err":
+			resMap[key] = data[idx].RecvErr
+		case "recv_drop":
+			resMap[key] = data[idx].RecvDrop
+		case "recv_fifo":
+			resMap[key] = data[idx].RecvFifo
+		case "recv_frame":
+			resMap[key] = data[idx].RecvFrame
+		case "recv_compressed":
+			resMap[key] = data[idx].RecvCompressed
+		case "recv_multicast":
+			resMap[key] = data[idx].RecvMulticast
+
+		case "send_byte":
+			resMap[key] = data[idx].TransByte
+		case "send_packet":
+			resMap[key] = data[idx].TransPacket
+		case "send_err":
+			resMap[key] = data[idx].TransErr
+		case "send_drop":
+			resMap[key] = data[idx].TransDrop
+		case "send_fifo":
+			resMap[key] = data[idx].TransFifo
+		case "send_frame":
+			resMap[key] = data[idx].TransFrame
+		case "send_compressed":
+			resMap[key] = data[idx].TransCompressed
+		case "send_multicast":
+			resMap[key] = data[idx].TransMulticast
+		default:
+
+		}
+	}
+
+	return resMap, nil
+}
\ No newline at end of file
diff --git a/stat/process.go b/stat/process.go
index 5ecb067..5c45944 100644
--- a/stat/process.go
+++ b/stat/process.go
@@ -9,17 +9,16 @@ import (
 type ProcessStat struct {
 	User,
 	Pid,
-	Size,
 	Pcpu,
 	Pmem,
 	Cmd string
 }
 
 func (ps *ProcessStat) Command() string {
-	return "ps -eo user,pid,size,pcpu,pmem,comm --sort=-pmem c"
+	return "ps -eo user,pid,pcpu,pmem,comm --sort=-pmem c"
 }
 
-func (ps *ProcessStat) Parse(r io.Reader) (*[]ProcessStat, error) {
+func (ps *ProcessStat) Read(r io.Reader) (*[]ProcessStat, error) {
 	var (
 		psStats = []ProcessStat{}
 		scanner = bufio.NewScanner(r)
@@ -31,11 +30,12 @@ func (ps *ProcessStat) Parse(r io.Reader) (*[]ProcessStat, error) {
 		psStats = append(psStats, ProcessStat{
 			User: parts[0],
 			Pid:  parts[1],
-			Size: parts[2],
-			Pcpu: parts[3],
-			Pmem: parts[4],
-			Cmd:  parts[5],
+			Pcpu: parts[2],
+			Pmem: parts[3],
+			Cmd:  parts[4],
 		})
 	}
+
+
 	return &psStats, scanner.Err()
 }
diff --git a/util/util.go b/util/util.go
index 8441def..e5906ea 100644
--- a/util/util.go
+++ b/util/util.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"math"
 	"strconv"
+	"regexp"
 )
 
 func StringToFloat64(str string) float64 {
@@ -24,3 +25,8 @@ func toFixed(num float64, precision int) float64 {
 	output := math.Pow(10, float64(precision))
 	return float64(round(num*output)) / output
 }
+
+func ExtractInBracket(str string) string {
+	regex := regexp.MustCompile(`\[(.*?)\]`)
+	return regex.FindStringSubmatch(str)[1]
+}