To reveal the similarities and differences between film cooling and film heating in the physical mechanisms, a numerical investigation is performed for a row of cylindrical holes under some typical blowing ratios (0.5, 1.0 and 1.5). The interaction features of jet-mainstream, as well as the effect of temperature ratio between the hot flow and cold flow on the film adiabatic heating or cooling effectiveness are analyzed. The results show that the jet penetration into the mainstream under the film heating scheme is more significant related to the film cooling scheme, causing the jet to lift off the surface and inducing bigger counter-rotating vortex pair downstream the film-hole. When the temperature ratio is close to 1, the film adiabatic heating effectiveness is nearly the same as the film adiabatic cooling effectiveness. However, once the temperature ratio is far deviated from 1, the difference between film adiabatic heating effectiveness and film adiabatic cooling effectiveness is behaved obviously.