The system and method for measuring arterial pressure by its effects consists of a six-stage procedure and three devices; the procedure to indirectly measure diastolic arterial pressure controls the tasks of a first device applying a measured gradual external contact force, a second sensor device of arterial that records arterial expression, and a third device which is a device to measure and detect the arterial cycle diastolic and systolic period in order to provide the diastolic arterial pressure value using an indirect method. Additionally, systolic arterial pressure is measured with no overpressure due to heartbeats produced after arterial occlusion.