According to the content of Ar39 in the sample to be tested,the age of the sample can be accurately calculated.This method is used in the measurement of glacial age,the measurement of ancient fossils,etc.So the Ar39 ion source has been established to meet the requirement of ice age survey and fossil survey.The software of the Ar39 ion source control system is based on EPICS(Experimental Physics and Industrial Control System)architecture.It mainly consists of two layers:IOC layer and an layer.The OPI layer also includes two layers:Channel Access(CA)client interface and application software.The IOC layer includes six layers:Channel Access(CA)server interface,database access interface,dynamic database,record support module,device support module and device driver.