The present invention relates to a safe docking system for preventing medical accident and a method thereof, and more particularly, to a safe docking system for preventing a medical accident and a method thereof, which can be used for a high risk blood-vessel injection medicine such as blood transfusion and an anticancer medicine, among medicines injected into a patient body for treatment, wherein a medicine inappropriate for injection is prevented from being injected into the patient by medical staff&prime；s fault to prevent a medical accident. The injectability of the high risk blood-vessel injection medicine can be primarily checked visually by differently designing a container (glass bottle, vinyl bag, etc.) for each type of the high risk blood-vessel injection medicine and each blood type of patients, and by displaying a design appropriate for a docking connector or the patient&prime；s blood type. Also, the present invention relates to a safe docking system for preventing a medical accident, in which the docking connector adapts various figures for the docking connector by each patient blood type to have an embossed or engraved shape, and an intermediate type docking connector and a patient docking connector including the embossed or engraved shape are designed to correspond to each other when connected to the container for each type of the high risk blood-vessel injection medicine, thereby preventing the blood-vessel injection medicine from being injected when a male and female thereof are not met during coupling and guiding the appropriate medicine to be injected into the patient by visual colors and physical shapes to prevent medical accident in advance. An embossed figure for each patient type is formed on an end of the docking connector, and an engraved figure for each patient type corresponding to the embossed figure is formed on a certain portion of the medical injection medicine bag, to be coupled such that the embossed and engraved figures closely cont
