Aiming at the status for motor protection, an intelligent protection instrument based on DSP sdesigned. This instrument can collect, process, export and display the parameters of motor's voltage,current,speed, vibration and temperature. At the same time, it also can collect and control the status of motor with a lotof input and output signals and adjust 45 kinds of parameters. Based on ADAM module's protocol and RS485 bus, the communication function can be realized successfully between intelligent protection instrument and host computer.