Abstract: This eight-channel multifunctional Radiation Monitoring Instrument is developed by making use of the built-in high-speed counters and the powerful instruction system of the SIEMENS SIMATICS S7 translated between Graduation Apparatus method and Formula method.The logicality of the high-dosage warning system is processed itself.The signal output will drive the alarm lights and bell directly.This paper series Programmable Logic Controllers（PLC） to record and process the pulse signal output by the detectors.The instrument with functions,such as analog and digital display,digital storage of digital data,pulse signal generator,network communication,can connect various types of pulse detectors.The initial process can be mainly describes the configuration,programming and feature of the instrument.