A dishwasher and a terminal device which creates a washing course to serve a purpose of use based on a user input and provides at least an expected amount of power to be supplied and an expected amount of water to be supplied for the created washing course. The terminal device includes a display for displaying an operating condition of a default washing course of the dishwasher; an input for receiving a command to change the operating condition from a user; and a controller for controlling the display to display at least one of an expected amount of power to be supplied, an expected amount of water to be supplied, and an expected time, which is changed according to a user-set washing course in response to the command received to change the operating condition of the default washing course.