Disclosed is a file uploading and downloading method based on a smart device. According to which a unique ID of the smart device is obtained and entered into a mobile device, whereby a communication connection is established between the mobile device and the smart device through a proxy service. As such, the mobile device can download the relevant files within the smart device through the web service and the proxy service, while the smart device can also obtain the files uploaded by the mobile device through the proxy service and the web service.