To provide an integral environment monitoring system for setting a monitor camera, and for flexibly coping with the collection of environment information even in a place where the maintenance of a communication network is insufficient.

This radio transmitter/receiver for communicating with a radio base station is mounted on an information collecting terminal or a network camera. An environment information DB for managing environment information from the information collecting terminal, a terminal information DB for managing the information of the information collecting terminal, and a base station information DB for managing information associated with the radio base station are connected to the management server. A function for acquiring and displaying a video transmitted from the network camera and the environment information transmitted from the information collecting terminal is mounted on the management server. A first communication interface which can be connected to a public network or LAN, a second communication interface for executing radio communication with the information collecting terminal, and a third communication interface for relay are mounted on the radio base station.