A force touch sensing structure which is immune to changes in sensitivity caused by external factors defines a force touch sensing area. The force touch sensing structure includes protrusions in the force touch sensing area, at least one image recognition camera, and a processor. A height of at least one protrusion varies when the force touch sensing area is force touched. The image recognition camera detects positions of the height-varied protrusions and the extent of the variations. The processor receives and processes signals from the at least one image recognition camera to obtain force touch position and touch force.