To surely restrain a diffusion effect of smoke from a fire disaster occurrence point in a short time, and to maintain a safe tunnel environment, in a two-way traffic type tunnel or a one-way traffic type tunnel.

This road tunnel ventilation controller or the like includes a wind velocity decrease computation part for decreasing a wind velocity in the tunnel when the fire disaster occurs, in a tunnel main line, and a performance evaluation means for evaluating performance of a ventilation system after executed, in the tunnel main line. The wind velocity decrease computation part includes a control determination means for determining using which one out of anemometers installed in both pit mouses from the fire disaster occurrence point, and a jet fan operation number-rotational direction setting means comprising a computing means for setting the operation number and rotational directions of jet fans, based on a wind direction and a wind velocity, and the wind velocity in the fire disaster occurrence point is controlled using the anemometers installed in both the pit mouses and the jet fans installed in the tunnel.