A multi-aperture imaging system and application thereof are provided. The multi-aperture imaging system includes a long-focal length camera module, a mid-focal length camera module and a wide-angle camera module. The long-focal length camera module has a field of view-FOV3. The mid-focal length camera module has a field of view-FOV2. The wide-angle camera module has a field of view-FOV1. They satisfy the condition of FOV1>FOV2>FOV3. Besides, a portion of the field of view area of FOV1 is covered by a portion of the field of view area of FOV2, while a portion of the field of view area of FOV2 is covered by a portion of the field of view area of FOV3, so as to enable a better zooming performance.