The purpose of the study is to make the quadrotor achieve obeject-grasping successfully. The modeling of the quadrotor and the control method are discussed in the thesis. The response of the gain design shows the requirement is met. Trilateration and RSSI (Received Signal Strength Indicator) value are used to perform position identifying and target navigation respectively. The quadrotor system is simulated under MATLAB Simulink. Hardware such as grasping-mechanism and radio module are also mentioned. The result revealed that object-grasping is possible for micro aerial vehicle.