The invention discloses an intelligent advertising system and an operation method thereof. The system comprises a management center and a plurality of advertising terminals, the advertising terminalscomprise housings, cavities are formed in the upper portions of the housings, first openings which are communicated with the cavities are formed in the upper portions of the upper sides of the housings, transparent glass plates are arranged at the first openings, a plurality of placing mechanisms used for placing advertising posters are arranged in the cavities side-by-side from front to back, storage chambers corresponding to each placing mechanism are formed below each placing mechanism, the storage chambers are communicated with the cavities, electric separation plates which can be turned in the up and down direction are arranged at the communication positions of the storage chambers and the cavities, second openings communicated with the cavities are formed in the upper portions of theright sides of the housings, door bodies are arranged at the second openings, and the housings are further provided with micro processors, power supply modules, buttons, wireless communication modules, illumination lamps and lighting sensors. By means of the system, different advertising posters can be automatically displayed at different time, and displayed contents are greatly enriched.