Camera optical axis calibrating system and camera optical axis calibrating method

A camera optical axis calibrating system, comprising:

• at least two laser modules configured to generate at least two light beam sets, wherein each of the at least two light beam sets comprises a first light beam and a second light beam, and a light beam angle difference is contained between the first light beam and the second light beam of each of the at least two light beam sets;
• a camera module at least comprising a first camera assembly and a second camera assembly, wherein the first camera assembly has a first optical axis, the second camera assembly has a second optical axis, an optical axis distance and an optical axis angle difference are contained between the first optical axis and the second optical axis, the first camera assembly shoots the first light beam of each of the at least two light beam sets to form a first imaging plane, the second camera assembly shoots the second light beam of each of the at least two light beam sets to form a second imaging plane, the first imaging plane comprises at least two first imaging points that do not overlap and respectively correspond to the first light beams of the at least two light beam sets, and the second imaging plane comprises at least two second imaging points that do not overlap and respectively correspond to the second light beams of the at least two light beam sets;
• and
• an analyzing module configured to analyze the first imaging plane and the second imaging plane;
• wherein the light beam angle difference of at least one of the at least two light beam sets is equal to the optical axis angle difference, and the analyzing module is configured to confirm whether a space relation between the first camera assembly and the second camera assembly is that the at least two first imaging points are located at a first inclined line passing through a center of the first imaging plane, the at least two second imaging points are located at a second inclined line passing through a center of the second imaging plane, and an imaging angle difference between a first imaging angle and a second image angle is smaller than or equal to 1 degree, wherein the first imaging angle is contained between the first inclined line and a first horizontal axis of the first imaging plane, and the second imaging angle is contained between the second inclined line and a second horizontal axis of the second imaging plane.