In order to resolve the uncertainty and variability of equipment maintenance information collecting requirement in the process of equipment employing, maintenance information modeling technology facing multiagent and multitasking is studied. The basic applying mode of maintenance information is studied from the sides of maintenance data, maintenance information and maintenance knowledge. Maintenance information collecting requirement ascertaining technology based on model tree is presented, as well as the the characteristic of information being gained. Aiming at the characteristic of multiagent and multitasking, maintenance information modeling method is presented based on event driving mechanism. At last the maintenance data warehouse system is designed. The research result shows that the maintenance information modeling technology being provided with favourable opening and expanding can deal with the fact of variational maintenance information collecting requirement.