Data access method, device and system

The invention provides a data access method, device and system, and the method comprises the steps: responding to a received data access request sent by a cloud mobile phone server, obtaining target local data in terminal equipment based on the data access request, and storing the target local data in a data storage module, the data storage module belongs to the super SIM card, storage address information of the target local data in the data storage module is determined, the storage address information is provided for a cloud mobile phone application, and the cloud mobile phone application is installed in the super SIM card in advance. By implementing the method disclosed by the invention, the access of the cloud mobile phone to the local data of the terminal can be completed under the condition that the terminal data does not leave the local of the terminal, so that the security and the access efficiency of the cloud mobile phone to access the local data of the terminal are greatly improved. 本公开提出一种数据访问方法、装置