Monitor system and operation method thereof

An operation method of a monitor system, wherein the monitor system comprises at least one three-dimensional camera circuit, a controller, a storage circuit, and a display, and each three-dimensional camera circuit of the at least one three-dimensional camera circuit comprises a first image sensor, a second image sensor, and a depth map generator, the operation method comprising:

• the each three-dimensional camera circuit capturing a plurality of images comprising an object, and generating a depth map corresponding to the object according to the plurality of images;
• the controller determining a plurality of feature points corresponding to the object according to the plurality of images or the depth map;
• the controller determining relative coordinates of the plurality of feature points and determining external information corresponding to the object;
• and
• the controller generating monitor information corresponding to the object according to offsets between the external information corresponding to the object and reference parameters corresponding to the object, wherein the relative coordinates of the plurality of feature points are not changed with distances between the at least one three-dimensional camera circuit and the plurality of feature points, the offsets are fixed, and the monitor information of the object is used for making the controller generate suggestions to reduce the offsets.