The invention relates to the technical field of tactile sensors, in particular to a tactile fingertip sensor and an operating system and a data processing method.The tactile fingertip sensor comprises a tactile skin, a mark array sticker and a monocular camera, the mark array sticker is pasted on the inner side of the tactile skin, and the bottom of the tactile skin and the bottom of the tactile fingertip sensor form a hollow cavity; the monocular camera is installed at the bottom of the touch fingertip sensor and located in the hollow cavity, and the vision field of the monocular camera covers the inner side of the touch skin. According to the touch fingertip sensor disclosed by the invention, when a mechanical finger wearing the sensor touches an object, the sensor shoots an internal mark array image through the monocular camera, inputs the internal mark array image to the upper computer for image processing and data analysis, and finally converts the internal mark array image into various touch information; comprise the deformation condition of the contact surface, the size and direction of pressure at each marked position, contact torque and the like. By means of the design, contact in different directions can be sensed, distributed touch information is provided, and it is guaranteed that the sensor is compact in structure and light in weight.