The invention discloses a method for monitoring traffic conditions and navigating in real time. The method includes that a monitoring sensor monitors and collects road condition information of current road segments and sends the road condition information to a wireless terminal; the wireless terminal receives the road condition information and transmits the same to the central server after being connected with the central server. The invention further provides the wireless terminal and a system comprising the monitoring sensor and the wireless terminal. By the method for monitoring the traffic conditions and navigating in real time, real-time monitoring on the road traffic conditions can be performed and early warnings are released timely, so that vehicle users are assisted to know the road condition information, occurrence probability of traffic jams can be reduced to a large extent, and traffic pressure can be eased.