The invention provides a data processing method, a data processing device and a wearable intelligent device. The data processing method is used for the wearable intelligent device. Multiple applications are installed on the wearable intelligent device. The data processing method includes the steps of obtaining the data processing amount of each application, obtaining the data communication amount between every two applications, determining migration data according to the data processing amount of each application and the data communication amount between every two applications, and sending the migration data to a mobile terminal to be processed by the mobile terminal. By means of the technical scheme, the data processing amount of the wearable intelligent device can be effectively decreased, and therefore the data processing speed and efficiency of the wearable intelligent device are increased.