The invention relates to a self-electricity-generation landscape lamp device. A copper containing device, a salt bridge, a zinc containing device, a storage battery, a time controller and a solar cell panel are installed on the roof of a building body. LED lamp strips are installed outside a wall of the building body. Electric energy obtained through conversion of the solar cell panel is input in the storage battery to be stored. Current formed by an electricity generation device composed of the copper containing device, the zinc containing device and the salt bridge is also input in the storage battery to be stored. At night, the storage battery supplies power to the LED lamp strips, materials are easy to take, installation is easy, and energy conservation and environment protection are achieved.