A monitoring camera terminal has an imaging portion for imaging a monitoring target area allocated to an own-terminal, an object extraction portion for processing a frame image imaged by the imaging portion to extract an imaged object, an ID addition portion for adding an ID to the object extracted by the object extraction portion, an object map creation portion for creating, for each object extracted by the object extraction portion, an object map associating the ID added to the object with a coordinate position in the frame image, and a tracing portion for tracing an object in the monitoring target area allocated to the own-terminal using the object maps created by the object map creation portion.