diff --git a/nicsensor.sh b/nicsensor.sh
index 4818d73..77e87b7 100755
--- a/nicsensor.sh
+++ b/nicsensor.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-SCRIPT_VERSION="1.8.5"
+SCRIPT_VERSION="1.8.6"
 # ---------------------------------------------------------
 # Project Feature Varible (Change if need)
 # ---------------------------------------------------------
@@ -139,6 +139,9 @@ INFO="Info"
 WARNING="Warning"
 ERROR="Error"
 log="/tmp/nicsensor_debug.log"
+pmbus_op="get"
+hex_pmbus_cmd=0xff
+hex_pmbus_size=0
 # ---------------------------------------------------------
 #  Script Function Defination
 # ---------------------------------------------------------
@@ -443,6 +446,23 @@ pre_exec_hook(){
             echo "Command Format  : ./nicsensor.sh [slot] pmbus [slave] [pmbus_command]"
             exit 1
         fi
+
+        # Pmbus Command need pre-process
+        PMBUS_PLUGIN="./pmbus_cmd_list.sh"
+        if [ -e ${PMBUS_PLUGIN} ];then
+            str_pmbus_cmd=$option_data
+            hex_pmbus_cmd=`$PMBUS_PLUGIN "code" $str_pmbus_cmd`
+
+            if [ "$hex_pmbus_cmd" = "0xff" ];then
+                fmt_print "console" $ERROR "Unsupport PMBUS Command : $str_pmbus_cmd"
+                exit 1
+            fi
+
+            hex_pmbus_size=`$PMBUS_PLUGIN "size" $str_pmbus_cmd`
+            pmbus_op=`$PMBUS_PLUGIN "operation" $str_pmbus_cmd`
+        else
+            fmt_print "console" $ERROR "Can't find pmbus plugin file, please copy pmbus_cmd_list.sh to here!"
+        fi
     fi
 
     # if the action is fru write, need pre-process fru data
@@ -1247,32 +1267,21 @@ process_fru(){
 # ---------------------------------------------------------
 #  PMBUS Function
 # ---------------------------------------------------------
-#@Param1 : Pmbus Command, hex data
-#@Param2 : Pmbus reading size, BYTE(1)|WORD(2)|BLOCK(3)|RAW(4)
+#@Param1 : Operation Type, get|set
+#@Param2 : Pmbus Command, hex data
+#@Param3 : Pmbus reading size, BYTE(1)|WORD(2)|BLOCK(3)|RAW(4)
 transfer_pmbus_command(){
-    pmbus_res=`i2ctransfer -y $i2c_bus w1@$chip_slave $1 r$2`
-    reset_pca9548 $i2c_bus $pca9548_slave
-    fmt_print "console" $INFO "$option_data ,Command Code:$pmbus_res"
-    fmt_print "console" $INFO "Result: $pmbus_res"
+    if [ "$1" = "get" ];then
+        pmbus_res=`i2ctransfer -y $i2c_bus w1@$chip_slave $2 r$3`
+        reset_pca9548 $i2c_bus $pca9548_slave
+        fmt_print "console" $INFO "$option_data ,Command Code:$pmbus_res"
+        fmt_print "console" $INFO "Result: $pmbus_res"
+    fi
 }
 
 # Do pmbus test if plugin avalible 
 process_pmbus(){
-    PMBUS_PLUGIN="./pmbus_cmd_list.sh"
-    if [ -e ${PMBUS_PLUGIN} ];then
-        str_pmbus_cmd=$option_data
-        hex_pmbus_cmd=`$PMBUS_PLUGIN "code" $str_pmbus_cmd`
-
-        if [ "$hex_pmbus_cmd" = "0xff" ];then
-            fmt_print "console" $ERROR "Unsupport PMBUS Command : $str_pmbus_cmd"
-            exit 1
-        fi
-
-        hex_pmbus_size=`$PMBUS_PLUGIN "size" $str_pmbus_cmd`
-        transfer_pmbus_command $hex_pmbus_cmd $hex_pmbus_size
-    else
-        fmt_print "console" $ERROR "Can't find pmbus plugin file, please copy pmbus_cmd_list.sh to here!"
-    fi    
+    transfer_pmbus_command $pmbus_op $hex_pmbus_cmd $hex_pmbus_size
 }
 
 # This function is temporarily retained for future functional expansion
diff --git a/pmbus_cmd_list.sh b/pmbus_cmd_list.sh
index d012807..5be4c34 100644
--- a/pmbus_cmd_list.sh
+++ b/pmbus_cmd_list.sh
@@ -35,16 +35,16 @@ pmbus_command_help(){
     echo "   3) E.G.             : ./nicsensor.sh pcie1 pmbus 0x60 READ_TEMPERATURE_1"
     echo ""
     echo "     *****************Pmbus Support Command List********************"
-    echo "      Command Name              Code      Read Size                 "
-    echo "      READ_VIN                  0x88      Word                      "
-    echo "      READ_IIN                  0x89      Word                      "
-    echo "      READ_VOUT                 0x8b      Word                      "
-    echo "      READ_IOUT                 0x8c      Word                      "
-    echo "      READ_TEMPERATURE_1        0x8d      Word                      "
-    echo "      READ_TEMPERATURE_2        0x8e      Word                      "
-    echo "      READ_TEMPERATURE_3        0x8f      Word                      "
-    echo "      READ_POUT                 0x96      Word                      "
-    echo "      READ_PIN                  0x97      Word                      "
+    echo "      Command Name              Code    op_type   Read Size         "
+    echo "      READ_VIN                  0x88     get      Word              "
+    echo "      READ_IIN                  0x89     get      Word              "
+    echo "      READ_VOUT                 0x8b     get      Word              "
+    echo "      READ_IOUT                 0x8c     get      Word              "
+    echo "      READ_TEMPERATURE_1        0x8d     get      Word              "
+    echo "      READ_TEMPERATURE_2        0x8e     get      Word              "
+    echo "      READ_TEMPERATURE_3        0x8f     get      Word              "
+    echo "      READ_POUT                 0x96     get      Word              "
+    echo "      READ_PIN                  0x97     get      Word              "
     echo "     ***************************************************************"
     echo ""
 }
@@ -85,6 +85,42 @@ find_pmbus_hex_code(){
     echo $hex_cmd
 }
 
+find_pmbus_operation_type(){
+    case ${str_cmd} in
+        "READ_VIN")
+            op_type="get"
+        ;;
+        "READ_IIN")
+            op_type="get"
+        ;;
+        "READ_VOUT")
+            op_type="get"
+        ;;
+        "READ_IOUT")
+            op_type="get"
+        ;;
+        "READ_TEMPERATURE_1")
+            op_type="get"
+        ;;
+        "READ_TEMPERATURE_2")
+            op_type="get"
+        ;;
+        "READ_TEMPERATURE_3")
+            op_type="get"
+        ;;
+        "READ_POUT")
+            op_type="get"
+        ;;
+        "READ_PIN")
+            op_type="get"
+        ;;
+        *)
+            op_type=""
+        ;;
+    esac
+    echo $op_type
+}
+
 find_pmbus_read_size(){
     case ${str_cmd} in
         "READ_VIN")
@@ -127,6 +163,9 @@ main(){
         "code")
             find_pmbus_hex_code
             ;;
+        "operation")
+            find_pmbus_operation_type
+            ;;
         "size")
             find_pmbus_read_size
             ;;