With the world wide inter-enterprise collaboration and interoperability background, automatic collaborative business process deduction might be seen as a crucial researching subject. We design a methodology of deducing collaborative process by only collecting collaborative objectives and partners’ business services. The two key problems are: (i) selecting corresponding business services for a set of collaborative objectives; (ii) ordering business services with serializations and parallelization. This paper aims to present solution of business service selection. In order to solve the problem, we defined a collaborative ontology, which contains numerous instances of business services and processes of MIT process handbook. The collaborative ontology contains essential concepts in collaborative situation, and owns process deducing rules and algorithms. We provide a brief illustration of implementation within a SaaS toolkit called Mediator Modeling 2ool.