A computer-implemented method and system for facilitating service transactions, both on-line and off-line, for transacting services driven by purchasers or by service providers. In particular, the invention makes services freely tradable as goods via standardizing material terms describing such service transactions. The method includes steps defining a set of service classification and material terms, registering a plurality of participants of the service marketplace, searching and compiling at least one offer and one request for offers provided by the participants for selling or buying services while the offer and the request for offer is described in the set of service classification and material terms, evaluating and matching the offer and the request for offer based upon the degree of identicalness of the set of service classification and material terms recited in the offer and the request for offer, and communicating to matched participants of the result generated by the evaluating and matching step.