Abstract: quality of automatic abstracting systems, the scheme to build multiagent systems for automatic abstracting （MAS/ABS） is put forward. To build such systems, there are two key problems to solve: what system model will be built and what coordination algorithm should be chosen. In this paper, a system model of the multiagent system for automatic abstracting in the Internet environment is given, and three kinds of coordination algorithms are set forth. Based on the simulations, the performance of the system is analyzed, the three kinds of coordination algorithms are compared, and the suitable number of abstracting agents for each domain in a given load is obtained.