A user interface device of a remote control system for a robot and a method using the same are provided. The user interface device includes: a radio frequency (RF) unit for receiving, from a remote control robot, camera data and at least one sensor data detecting a distance; a display unit having a main screen and at least one auxiliary screen; and a controller having an environment evaluation module for determining whether the received camera data are in a normal condition, and having a screen display mode change module for displaying, if the received camera data are in a normal condition, the camera data on the main screen and displaying, if the received camera data are in an abnormal condition, the sensor data on the main screen.