To effectively provide sales promotion information such as time sales or the like to many consumers.

When an enterpriser performs a time sales, the announcement of the effect is voice-inputted from an enterpriser's management terminal 2 having a telephone function, and accumulated in a serve device 1. When the announcement is accumulated in the server device 1, the accumulation of a new announcement is reported by mail to a cellular phone 4 performing a signal exchange with a base station 7 designated by the enterpriser. The user (consumer) of the cellular phone 4 receiving the mail can access the server device 1 through the cellular phone 4 to hear the accumulated announcement. By hearing the announcement, a coupon related to a target commodity of the time sales is transmitted by mail from the server device 1 to the cellular phone 4.