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An apparatus of climatic information acquisition and wireless transmission is developed for frost protection of tea farm. The hardware of the system is made up of a microcomputer AT89C52, an A/D convertor, a TC35i GSM module, a RAM, a liquid crystal displayer, a keyboard, a printer, a power supply and several sensors, which can measure meteorological parameters such as air temperature & humidity, radiation, wind speed and so on. The software is programmed with assembly language and the function includes system setting, SMS receiving & sending, data storage and inquery, result display and printing management. The apparatus can be used for on-line information acquisition and wireless transmission with high reliability in remote tea field in order to provide the basis for tea plant management decisions, especially for the early warning of late spring cold.