The present invention relates to a reservation and payment system using SNS and a method therefor, and in particular, when one of a specific text and a specific image displayed while an SNS is used is selected, a reservation page corresponding to the selected one of the specific text and the specific image may be called or a corresponding reservation screen may be displayed by executing a reservation app installed in a terminal, and a reservation function or waiting number provision function may be performed by using personal information pre-stored in the terminal.