A system and a method for cloud medical image analysis are provided. The system for cloud medical image analysis has a cloud medical analysis platform and an electronic device. The electronic device obtains a medical image. The electronic device quantifies the medical image to obtain a first feature value. The electronic device sends the first feature value to the cloud medical analysis platform. The cloud medical analysis platform inputs the first feature value into an analysis module to obtain an analysis result, wherein the analysis module uses a self-learning module and the analysis module is trained via a plurality of training images. The cloud medical analysis platform sends the analysis result to the electronic device.