The present invention discloses a method and system for managing data service network of Metropolitan Area Network (MAN), as well as a method for searching data service paths based on the MAN system. The solution of the present invention includes binding Virtual Channel Trail Termination Points (VCTTPs) at each end of at least two Virtual Channels (VCs) as Path Trails with Trunk Trail Termination Points (TrunkTTPs) of a Trunk trail by Trunkbind to form a Trunk trail; and connecting the TrunkTTPs to termination points of a data service trail by Ethernet cross connection to carry data service. The present invention converges the data service with the prior Synchronous Digital Hierarchy (SDH) service smoothly, facilitates the management of data service network of MAN, increases the compatibility of network system and efficiency of service management and improves the transport efficiency and the reliability of data services of MAN.