In this study (1) contractor selection and pre-qualification models and systems in the literature are examined and (2) the proposal of a multi agent systems (MAS) based contractor prequalification model in order to support client's decision with the optimal solution in a contractor selection phase are introduced. A meta-classification and analysis study based on a comprehensive literature survey is used to analyse models and approaches available. Three basic tendering processes, which are open, selective limited and negotiated, were studied and a prototype program is created to implement the model proposed. In addition, the tender management system is conceptually discussed in the context of the model.