The effect of exchange anisotropy and stress anisotropy on properties of a ferromagnetic and antiferromagnetic bilayer films are investigated by ferromagnetic resonance method. It is shown that exchange anisotropy results from the unidirectional anisotropy. And stress anisotropy has large effect on hard or easy magnetization direction. When external magnetic field direction and stress field direction are parallel, the resonance frequency is shifted to higher value, and the frequency linewidth becomes wider. When external magnetic field is varied, the stress anisotropy made resonance frequency shifted to lower value. Especially, it is very complex in direction β=π. For weak magnetic field, there are two regions. In certain magnetic field region, the resonance frequency is shifted to higher value and frequency linewidth becomes widened. However, the resonance frequency (frequency linewidth) is shifted to higher value (is widened) or lower value (is sharpened) depended on the external magnetic field in other region.