Backpack power supply device and backpack tool system

A backpack power supply device and a backpack tool system is provided. The backpack power supply device includes: a backpack assembly, a battery pack, a control panel and a power cable. Wherein, the battery pack and the control panel are arranged on the backpack assembly, and the control panel is electrically connected with the battery pack. A first end of the power cable is electrically connected with the battery pack and the control panel, and a second end is provided with a connecting terminal that may be electrically connected with multiple power tools. The power tool adjusts its operating state according to a signals received from the control panel. The backpack power supply device and backpack tool system may solve problems of high cost of the conventional backpack garden tool systems and poor interchangeability of power tools.