diff --git a/nicsensor.sh b/nicsensor.sh
index d8cc15b..5c758aa 100755
--- a/nicsensor.sh
+++ b/nicsensor.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-SCRIPT_VERSION="1.8.3"
+SCRIPT_VERSION="1.8.4"
 # ---------------------------------------------------------
 # Project Feature Varible (Change if need)
 # ---------------------------------------------------------
@@ -142,6 +142,13 @@ log="/tmp/nicsensor_debug.log"
 # ---------------------------------------------------------
 #  Script Function Defination
 # ---------------------------------------------------------
+search_plugin_help(){
+    PMBUS_PLUGIN="./pmbus_cmd_list.sh"
+    if [ -e ${PMBUS_PLUGIN} ];then
+        $PMBUS_PLUGIN "help"
+    fi
+}
+
 print_usage(){
     echo ""
     echo "================>>> nicsensor script usage <<<=================="
@@ -189,6 +196,8 @@ print_usage(){
     echo "   3) E.G.             : ./nicsensor.sh set server 5280m7"
     echo "                       : ./nicsensor.sh set debug 1"
     echo "                       : ./nicsensor.sh set detect 1"
+    echo ""
+    search_plugin_help
 }
 
 # print format message to console|debuglog
@@ -1227,6 +1236,33 @@ process_fru(){
     fi
 }
 
+#@Param1 : Pmbus Command, hex data
+#@Param2 : 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 Result: $pmbus_res"
+}
+
+# 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    
+}
+
 # This function is temporarily retained for future functional expansion
 handle_reserve(){
     fmt_print "console" $INFO "Waiting for user defined"
@@ -1271,6 +1307,9 @@ start_get_sensor(){
         "fru")
             process_fru
             ;;
+        "pmbus")
+            process_pmbus
+            ;;
         "reserve")
             handle_reserve
             ;;
diff --git a/pmbus_cmd_list.sh b/pmbus_cmd_list.sh
new file mode 100644
index 0000000..d012807
--- /dev/null
+++ b/pmbus_cmd_list.sh
@@ -0,0 +1,145 @@
+#!/bin/sh
+
+# Desc       : This script used to find pmbus code and read size
+# Todo       : Support PMBUS Setting Function
+# Version    : 0.1
+# Date       : 2025-12-25
+# Changelist : 2025-12-25|v0.1 Create this file
+
+# How to use this pmbus plugin?
+#   Copy this file to the dir as same as nicsensor.sh
+
+# ---------------------------------------------------------
+# Varible Define
+# ---------------------------------------------------------
+operation_type=$1
+str_cmd=$2
+hex_cmd=0xff
+read_size=0
+
+PMBUS_BYTE=1
+PMBUS_WORD=2
+PMBUS_BLOCK=3
+PMBUS_RAW=4
+
+# ---------------------------------------------------------
+# Function Define
+# ---------------------------------------------------------
+pmbus_command_help(){
+    echo "  Extend Function - PMBUS command test"
+    echo "   1) Command Format   : ./nicsensor.sh [slot] pmbus [slave] [command]"
+    echo "   2) Option Detail"
+    echo "       - [slot]        : 0 1 2 3 4 5 ..."
+    echo "       - [slave]       :  power manage chip slave address , please provide 7 bit address"
+    echo "       - [command]     : The pmbus command which will set to the power manage chip"
+    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 "     ***************************************************************"
+    echo ""
+}
+
+find_pmbus_hex_code(){
+    case ${str_cmd} in
+        "READ_VIN")
+            hex_cmd=0x88
+        ;;
+        "READ_IIN")
+            hex_cmd=0x89
+        ;;
+        "READ_VOUT")
+            hex_cmd=0x8b
+        ;;
+        "READ_IOUT")
+            hex_cmd=0x8c
+        ;;
+        "READ_TEMPERATURE_1")
+            hex_cmd=0x8d
+        ;;
+        "READ_TEMPERATURE_2")
+            hex_cmd=0x8e
+        ;;
+        "READ_TEMPERATURE_3")
+            hex_cmd=0x8f
+        ;;
+        "READ_POUT")
+            hex_cmd=0x96
+        ;;
+        "READ_PIN")
+            hex_cmd=0x97
+        ;;
+        *)
+            hex_cmd=0xff
+        ;;
+    esac
+    echo $hex_cmd
+}
+
+find_pmbus_read_size(){
+    case ${str_cmd} in
+        "READ_VIN")
+            read_size=$PMBUS_WORD
+        ;;
+        "READ_IIN")
+            read_size=$PMBUS_WORD
+        ;;
+        "READ_VOUT")
+            read_size=$PMBUS_WORD
+        ;;
+        "READ_IOUT")
+            read_size=$PMBUS_WORD
+        ;;
+        "READ_TEMPERATURE_1")
+            read_size=$PMBUS_WORD
+        ;;
+        "READ_TEMPERATURE_2")
+            read_size=$PMBUS_WORD
+        ;;
+        "READ_TEMPERATURE_3")
+            read_size=$PMBUS_WORD
+        ;;
+        "READ_POUT")
+            read_size=$PMBUS_WORD
+        ;;
+        "READ_PIN")
+            read_size=$PMBUS_WORD
+        ;;
+        *)
+            read_size=0
+        ;;
+    esac
+    echo $read_size
+}
+
+main(){
+
+    case ${operation_type} in
+        "code")
+            find_pmbus_hex_code
+            ;;
+        "size")
+            find_pmbus_read_size
+            ;;
+        "help")
+            pmbus_command_help
+            ;;
+        *)
+            echo "Error command type"
+            ;;
+    esac
+}
+
+# ---------------------------------------------------------
+# Start Execute Script(main)
+# ---------------------------------------------------------
+main
\ No newline at end of file