The utility model discloses an electric transmission line micro-meteorological monitoring device based on a cloud server. The device provided by the utility model comprises a data acquisition terminal. Data acquired by the data acquisition terminal is transmitted to a programmable logic controller PLC. The PLC stores the received data in a memory card and simultaneously transmits the data to the cloud server through a GPRS module. The PLC acquires electric energy through a storage battery which acquires a power source from an electric transmission line through a CT power gaining device. According to the utility model, all-weather real-time monitoring is carried out mainly in allusion to meteorological environment data of an electric transmission line, and meteorological real-time data, such as temperature, humidity, wind speed, wind direction, rainfall, optical radiation and the like, are acquired and stored. The device provided by the utility model can be used as the basis for analysis and judgment of icing condition of the electric transmission line and also can provide comprehensive information for disaster forecasting, condition-based maintenance and the like.