The invention provides a low-power consumption shaking-sound-image combination detection system and belongs to the technical field of security and protection. The system comprises a shaking detectionpart, an image detection part, a sound sensing part, a data processing unit and a data transmission unit. The system has the advantages of easy layout, low power consumption, false alarm prevention and automatic target identification and is suitable for being arranged in sparsely-populated, open and flat important areas to achieve the objective of guardlessness and remote investigation and monitoring.