Abstract: In view of problems that traditional handheld terminal is difficult to communicate in coal mine and its standby time is short, a design scheme of handheld terminal with low-power consumption was proposed, and designs of hardware circuit and software of the handheld terminal were introduced. The handheld terminal uses PXA322 processor to finish collection and transmission of data of voice, image and video, programmable management of power supply circuit was designed for that WiFi network wastes electricity in searching on network. The experiment result showed that the handheld terminal has characteristic of reliable communication，low-power consumption and long lifetime, which can satisfy with demand of underground production application.