This paper describes an integrated service and network management system for provisioning the point-to-multipoint reservation service (PMRS) in an ATM network. There are two major issues confronting the network service provider in relation to this service: one is to rapidly confirm the acceptability of the subscriber's reservation at subscription time, and the other is to punctually activate the reserved point-to-multipoint service. To meet these requirements, this paper proposes a service provision model (SPM) and a network resource model of bandwidth allocation timetable (BAT). This paper likewise proposes a point-to-multipoint routing algorithm composed of ordering and backtracking procedures, which can find an optimal branch point under the complex network topology and can add more destinations to the existing point-to-multipoint route. Lastly, this paper shows the feasibilities of the SPM, the BAT and the point-tomultipoint routing algorithm by means of implementation and performance analysis under the real ATM network of Korea Telecom.