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In order to meet the needs of miniaturization and digitalization of meteorological observation instruments and equipment, BME280 is used as the core sensing element of meteorological elements, as well as the domestic single-chip microcomputer STC15W408AS and peripheral circuits. Through the optimization design of hardware power supply, PCB and software data quality control, a digital, miniaturized, multi-element integrated meteorological measurement module with anti-interference and quality control performance has been successfully developed. The precise measurement of temperature, humidity and air pressure is realized on the volume of pen-like structure, and a miniature digital intelligent meteorological sensor is formed. During the field test for 4 months, the measured module and the standard were compared and analyzed. The evaluation results show that the standard deviation of temperature is 0.029, the standard deviation of humidity is 0.047, and the standard deviation of air pressure is 0.000479. The main performance indicators of the measurement module meet the design requirements, and the long-term work is stable and reliable. The module has dual serial port output of RS232 and USB, which is easy to connect to automatic weather stations. It is also very convenient to use as a multi-node network in large-scale meteorological monitoring application scenarios of the Internet of Things.