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The construction and the reliability of an automatic weather station in the extreme circumstance of the Everest region are discussed. The Compass Navigation Satellite System was adopted in establishing the automatic weather station in the Everest region. A brief analysis and comparison of the data transmission methods commonly used are conducted. The communication control system and communication solution are designed to fit in with the Compass Navigation Satellite System. The hierarchy idea is applied to improve the expansibility and maintainability, and the mechanisms such as reconnection, receipt, resending and verification are utilized to guarantee the stability and reliability of the system.