Apparatus and method for providing user interface for recognizing gesture

PURPOSE: An apparatus for providing user interface recognizing gesture and a method thereof are provided to enable a user to grab and manipulate a virtual object in the same manner as being used in grabbing an object by a hand or a tool in the real world. CONSTITUTION: An image providing unit (410) provides virtual reality to a three dimensional domain. An operation recognition unit (420) recognizes gesture on the basis of user experience through visual contact effect. The gesture is expressed in the three dimensional domain. A processing unit (430) recognizes the gesture. The processing unit manipulates at least one bubble cloud. [Reference numerals] (410) Image providing unit; (420) Operation recognition unit; (430) Processing unit