A traffic control device and a traffic control system are provided, and the traffic control device includes a route calculating unit configured to detect candidates of a route to a destination, and decide a guidance route from the detected route candidates, an infrastructure communicating unit configured to acquire signal cycle information related to a cycle at which a display of a traffic signal at a traffic signal location on the route calculated by the route calculating unit is switched, and a fuel consumption simulating unit configured to perform fuel consumption simulation including fuel economy improvement assistance executed at a time of passing the traffic signal location with respect to the route candidates based on the signal cycle information acquired by the infrastructure communicating unit, and the route calculating unit decides the guidance route based on the fuel consumption simulation calculated corresponding to the route candidates by the fuel consumption simulating unit.