An information broadcasting and interaction system includes: a control device; a Bluetooth smart network connected with the control device, including a plurality of node devices and sense devices, and configured to operate in a mesh mode, a beacon mode, or a deep sleep mode; and a plurality of user devices connected with the Bluetooth smart network. Each node device is configured to relay control and broadcast information or feedback information between the control device and any specific device in the Bluetooth smart network, and to broadcast customized information to the user devices in a predetermined range. Each sense device is configured to collect data with a sensor integrated with the device, and relay the data to the control device.