An information transmission method, which is a method in which an information transmission apparatus transmits information through a dial pad during a call in a terminal, includes: executing an application program storing all or part of the information and displaying an application interface including the all or part of the information; executing the dial pad in a state where the application interface is displayed, and simultaneously displaying the dial pad and the application interface; and transmitting the information to another party through the dial pad, based on content of the application interface.