To resolve the contradiction of domain currency and abstract quality of automatic abstracting systems,we put forward the solution to build automatic abstracting systems based on multiagent technologies.To build such systems,there are two key problems:firstly,how many abstracting agents for each domain are suitable in some load.Secondly,what coordination strategy should be used.In this paper,the model of an automatic abstracting system based on multiagent technologies is given,and three kinds of coordination algorithms are set forth.We analyze the performance of the system based on the simulations,and get suitable number of abstracting agents for each domain in given load.Furthermore,we compare three given coordination algorithms.