An illumination module and a lamp, the illumination module is adapted to be assembled with at least two different installation components. The illumination module includes: a housing including a main body part, a side wall extending from the main body part, and an installation region for disposing the installation components, the installation region includes a first installation part and a second installation part, the first installation part is located on an outer periphery of a back face of the main body part of the housing and configured to be assembled with an installation component, and the second installation part is located on the side wall at the back face of the housing and configured to assemble with an installation component; and a light source component, installed on a front face of the main body part of the housing.