The invention relates to visual guidance engine cylinder unstacking detection robot equipment and a method thereof. The equipment is provided with a joint robot system, a visual guidance engine cylinder unstacking detection robot end executor, a visual detection marking system, a control system, a conveying system and a stacking station. The equipment is provided with a joint robot system, a visual guidance engine cylinder unstacking detection robot end executor, a visual detection marking system, a control system, a conveying system and a stacking station. The equipment is convenient to operate, time-saving and labor-saving, achieves accurate carrying and automatic detection marking of engine cylinder block production unstacking and stacking, effectively improves the production efficiency, replaces the heavy carrying work of workers in cycles, reduces the ever-increasing labor cost, has very high economic benefit value, and is worthy of application and popularization. The equipment isprovided with a safety protection system, so that the safety of personnel in a workshop is guaranteed, the probability of safety accidents is reduced, and the requirements of modern safety productionare met.