In order to achieve remote measurement of laser power and ensure the security of data transmission, a data acquisition and transmission module for non-networked wireless laser power meter is designed. The module consists of three parts: STM32 data acquisition module, wireless RS485 transparent transmission module and Qt host computer software. The STM32 data acquisition module converts the voltage analog signal collected by the detector into a digital signal. The wireless RS485 transparent transmission module is responsible for the data communication between the STM32 data acquisition module and the PC. The Qt host computer program processes the received data and displays the real-time laser power curve. The test results show that at a transmission distance of 1 km, the module successfully collected a complete laser power curve, with a data transmission error rate of 0. This module realizes long-distance and high-speed power data acquisition and transmission functions, and lays a foundation for the later development of wireless laser power meters.