1. An interface controlling system, the system comprising: a contact unit configured to receive a lateral force input information relative to a contact surface of the contact unit; a base disposed on one surface of the contact unit; a sensing unit including a force sensor configured to measure the lateral force input information received from the contact unit, wherein the force sensor is laterally disposed between the contact unit and the base; and a content controller configured to generate content control information by analyzing the measured lateral force input information, and to control content, for provision to a user, based on the generated content control information, wherein an elastic substance is laterally disposed between the force sensor and at least one of the contact unit or the base.