Aiming at the present city's growing traffic jams, the traditional method of traffic control is inflexible and difficulty to adapt because of the current traffic demand. This paper presents a real-time adaptive traffic signal countdown display control method, which can be throughout the countdown, no transitions, timing and consistent focus on an actual time. According to real-time traffic conditions for each phase adjustment target phase green countdown time, this method not only allows people to learn the real countdown time, but also effectively relieves traffic congestion, with good practicality.