This paper introduces an application of progammable logic controller (PLC) in air cable car for Langshan in Nantong and describes its software and hardware configuration structure. The main machine C60P CDR A, expanding machine C60 EDR A made in Japan and a few relays instead of a lot of contacters to achieve technological specfication process. An auxiliary contact of each contacter feedbacks to the input of PLC. The actual distance of travel of car is displayed by using PLC technology. The deceleration and acceleration as the car arriving at or departing from the station are dual controlled by software or hardware. The procedures about start up and stopping, given value of speed, alarm and display are programmed in ladder diagram language. Facts proved that the system has higher reliability, effective self diagnostic ability, flexible controlling mode. It is very simply and convenient to examine and repair.