To report information in accordance with the characteristic of a receiver and the situation of the receiver each occasion without increasing the burden on a network.

An information to be reported is divided by a means 100 for generating a plurality of kinds of report information and the plurality of kinds of report information are generated based on the divided pieces of information. A priority setting means 200 sets a priority which indicates reporting order to each kind of report information. An information transmitting means 300 transmits the plurality of kind of report information to the receiver in order from the one with the higher priority through the user of a reporting unit and continues transmitting the plurality of report information in order till a reception confirming signal is transmitted from the receiver.