The invention discloses an electricity saving management method of Ad Hoc network nodes, which comprises the following steps: a node which is in power save mode enters within the preset RTIM window time of the node and stays in wake-up state at least until the end of the RTIM window time; a neighbor node which has a message to send to the node in power save mode sends a service indication frame to the node in power save node within the RTIM window time of the node in power save mode; and the neighbor node and the node in power save mode enter or stay in the wake-up state after the RTIM windowtime ends, and conduct message interaction. The invention also discloses an Ad Hoc network system and a mobile terminal as an Ad Hoc network node. By means of the invention, power-saving management is realized when service interaction is little or no between the node in power save mode and the neighbor node.