Remote sensing-based earth surface evapotranspiration measuring and calculating system and measuring and calculating method

The invention discloses an earth surface evapotranspiration measuring and calculating system and method based on remote sensing. The earth surface evapotranspiration measuring and calculating system comprises an acquisition module, a remote sensing module, an inversion module, a data processing module, a data storage module and a control module. According to the scheme, detailed numerical values in all aspects and a direct surface evapotranspiration numerical value can be obtained through a sensor unit and a man-machine interaction unit in the acquisition module, so that a direct measurement and calculation method and an indirect measurement and calculation method are provided, and data acquisition is more comprehensive; through the cooperation of infrared remote sensing and microwave remote sensing in the remote sensing module, the system can adapt to more climate conditions, and image data can be obtained in cloudy and rainy days; according to the method, parameters are obtained from multiple aspects, evalu