In response to a request from a terminal, a sales-force server creates a page for providing information regarding sales activities, and sends the created page to the terminal. An e-mail server sends an e-mail including a word(s) registered in a first word table to a new addressee. The sales-force server provides the terminal with data corresponding to a predetermined number of sales tools whose usage frequency is equal to or greater than a predetermined value. The sales-force server provides a staff terminal used by at least one sales staff with target information, based on calling history regarding telephone calls from at least one customer to a call center. The sales-force server provides the staff terminal with a correction message, upon detection of error information included in utterance of the sales staff which corresponds to voice data created by the staff terminal.