Acupuncture or optical stimulation system (100) comprising: a mapping module (1), landmarks (2) suitable for being applied to a patient's body, a 3D scanning module (3) suitable for performing a 3D scan (S1) of the patient's body, a data association module (4) configured to associate the 3D scan (S1) with an acupuncture application sequence (S2) of the mapping module (1), a projector (5) connected to the data association module (4) to project a mark (50) on the patient's body in a temporal sequence and in positions of the points to be treated, an alignment support (6) suitable for being placed on said mark (50) to align an application of a needle (7) or of an optical stimulation device on the mark (50), an optical detection module (8) for detecting whether the alignment support (6) is correctly positioned on said mark (50); and an alarm device (9) operatively connected to the optical detection module (8) and configured to inform the operator about a correct positioning of the alignment support (6) on the mark (50).