A bicycle meter assembly for mounting on a bicycle, comprising: a sensor module including: a microprocessor; a sensing unit electrically connected to the microprocessor and adapted to sense a set of traveling information from the bicycle being ridden, the traveling information including time information, speed information, and distance information; a display unit electrically connected to the microprocessor and adapted to display the set of traveling information sensed by the sensing unit; a keypad including at least a bicycle positioning button adapted to generate a call signal when the bicycle positioning button is pressed by a user; an encoder electrically connected to the microprocessor and adapted to encode the call signal; a wireless transceiver electrically connected to the microprocessor and adapted to transmit the call signal having been encoded by the encoder; a body signal sensing unit adapted to sense a set of body signals from a user riding the bicycle; and a receiver module including: a wireless receiver adapted to receive the call signal transmitted by the wireless transceiver of the sensor module; a decoder electrically connected to the wireless receiver and adapted to decode the call signal received by the wireless receiver to generate a trigger signal; and a warning unit electrically connected to the wireless receiver and adapted to be triggered by the trigger signal to emit a warning signal; characterised in that the body signals include at least one of a body temperature signal and a calorie consumption signal, and the sensor module is adapted to be removed from the bicycle and carried by the user. a sensor module including: a microprocessor; a sensing unit electrically connected to the microprocessor and adapted to sense a set of traveling information from the bicycle being ridden, the traveling information including time information, speed information, and distance information; a display unit electrically connected to the microprocessor and adapted to display the set of traveling information sensed by the sensing unit; a keypad including at least a bicycle positioning button adapted to generate a call signal when the bicycle positioning button is pressed by a user; an encoder electrically connected to the microprocessor and adapted to encode the call signal; a wireless transceiver electrically connected to the microprocessor and adapted to transmit the call signal having been encoded by the encoder; a body signal sensing unit adapted to sense a set of body signals from a user riding the bicycle; and a microprocessor; a sensing unit electrically connected to the microprocessor and adapted to sense a set of traveling information from the bicycle being ridden, the traveling information including time information, speed information, and distance information; a display unit electrically connected to the microprocessor and adapted to display the set of traveling information sensed by the sensing unit; a keypad including at least a bicycle positioning button adapted to generate a call signal when the bicycle positioning button is pressed by a user; an encoder electrically connected to the microprocessor and adapted to encode the call signal; a wireless transceiver electrically connected to the microprocessor and adapted to transmit the call signal having been encoded by the encoder; a body signal sensing unit adapted to sense a set of body signals from a user riding the bicycle; and a receiver module including: a wireless receiver adapted to receive the call signal transmitted by the wireless transceiver of the sensor module; a decoder electrically connected to the wireless receiver and adapted to decode the call signal received by the wireless receiver to generate a trigger signal; and a warning unit electrically connected to the wireless receiver and adapted to be triggered by the trigger signal to emit a warning signal; a wireless receiver adapted to receive the call signal transmitted by the wireless transceiver of the sensor module; a decoder electrically connected to the wireless receiver and adapted to decode the call signal received by the wireless receiver to generate a trigger signal; and a warning unit electrically connected to the wireless receiver and adapted to be triggered by the trigger signal to emit a warning signal;