Adopt ZigBee to transport the output data of PMUs（Phasor Measurement Units）in finite regions in the ship supervising system. two wireless extended schemes of interfaces of PMU, RS-232 and SSI, were proposed based on CC2430, one kind of Zigbee chips, and their software and hardware were designed, too. Finally, the first scheme was tested by a serial port debug tool. The results showed the schemes could achieve reliable wireless link between PMUs and supervising ends, enhance the communication capability of PMUs. Thereby, the PMUs working with clock synchronization, which achieves synchronized collections, could take on diverse functions and new features.