An electronic system includes a first electronic apparatus and a second electronic apparatus. The first electronic apparatus includes a first low-energy communication unit, a camera unit and a first control unit. The camera unit is configured for capturing multimedia files. The first control unit is configured for generating a plurality of metadata related to the multimedia files respectively. The second electronic apparatus includes a second low-energy communication unit and a second control unit. The second low-energy communication unit is configured for establishing a first wireless connection with the first low-energy communication unit, and receiving the metadata related to each of the multimedia files without receiving original contents of the multimedia files. The second control unit is coupled with the second low-energy communication unit. The second control unit is configured for classifying the metadata into at least one group.