The invention discloses a tourism data investigation and detection system. The system includes a power supply, a switch, a data processing unit, an information acquisition unit, an online investigation module, a people flow estimation unit, a people flow detection unit, a data comparison unit, a baffle, a memory module, an environment monitoring unit, a GPS module, a voice broadcast unit, a data display screen, a protection circuit, a tourist schedule acquisition unit, a tourist schedule acquisition unit, a tourist online statistics unit, a supporting plate and a base. The power source is electrically connected with the switch through a wire, the switch is electrically connected with the data processing unit through a wire, and the data processing unit is electrically connected with the people flow estimation unit through a wire. The system is reasonable in design and structure, the number of tourists coming to the scenic area can be transmitted to the tourists in the scenic area through the data display screen and the voice broadcast unit, reasonable control over the visitor flow of the scenic area is improved, protection and management of the scenic area are improved, and trafficconfusion is avoided.