The invention discloses a portable wireless storage system with a portable power source function. The portable wireless storage system comprises a WIFI (Wireless Fidelity) signal RF (Radio Frequency) processing unit, a multimedia processing unit, a storage management unit and a power source management unit, wherein the WIFI signal RF processing unit is used for realizing data file sending or receiving; the multimedia processing unit is used for realizing the processing of a data file; the storage management unit is used for expanding a data processing capability of the multimedia processing unit and converting data in a storage medium into a USB (Universal Serial Bus) signal, and is communicated with the multimedia processing unit by a USB bus to realize a wireless storage function; the power source management unit is used for supplying power to the whole system, controlling the power supply of each unit of the system and managing a charging/discharging process of a battery in real time. According to the data storage disclosed by the invention, except build-in storage of a product, the storage of a Micro SD (Secure Digital) card and USB storage equipment can be expanded by a Micro SD interface and a USB interface. Furthermore, the USB interface is conveniently and externally connected with USB functional peripheral equipment to realize a video monitoring function, a temperature testing function and the like. According to the portable wireless storage system, system equipment supporting a WIFI function, such as existing IOS (Iphone Operating System), ANDROID and the like in hands, can be matched to realize data storage and sharing functions.