A wireless swing angles detection scheme for crane system based on micro-electro-mechanical systems（ MEMS） is presented and realized. The system includes two sets of modules of MEMS-based attitude heading reference systems（ AHRS） with wireless communication function. One set is installed on the crane body to measure attitude of crane base

and the other is with the hook to detect the attitude of payload. The swing angles of the payload can be calculated by calibrating the attitudes of the payload to the crane body

experimental modules integrates Zig Bee wireless communication into AHRS based on MEMS. Experimental results show the device can effectively realize swing angles effective measurement of crane system.