To provide a security device for home use which is low in maintenance cost.

The home security device A is provided with a packet communication modem 1, a monitoring circuit 2 for monitoring an abnormality outside/inside the house by a living room camera 21 or a plurality of sensors, a liquid crystal monitor 3 with a speaker 34 disposed on a wall of a living room, and a control circuit 4 for controlling trouble report information. When a viewing availability determination means 41 grasps the behavior of the person at home and determines to be available to view an advertisement, an advertisement distribution company distributes the advertisement and pays the advertisement fee, to a service contractant, equivalent to advertisement amount viewed by the person at home. Thus, the maintenance cost can be reduced by balancing with the advertisement fee paid by the advertisement distribution company.