【Objective】To construct the real-time embedded multi-dot temperature and humidity wireless data acquisition system based on the granary environment control for temperature and humidity requirements and wireless data transfer characteristics. 【Method】This design applied multi-dot single bus digital temperature sensor DS18B20 and humidity sensor HIH3605 to detect granary environment, transplanted a typical real-time embedded operating system μC/OS-II to LPC2103 high performance processor platform, and chose JZ877 for wireless data transmission. 【Result and conclusion】 Practical tests proved that multi-dot temperature and humidity effective collection and monitoring (alarm) system was established. The real-time operating system has wireless data transmission, data storage and processing functions. It also has advantages of simple human-machine interface and easy of network extensibility.