1. A method for mobile search, comprising: sending, by a first search server, a first information list of a first group of member engines to a second search server; receiving, by the first search server, a second information list of a second group of member engines, wherein the second information list of the second group of member engines is returned by the second search server, and the second information list of the second group of member engines is obtained after the second search server has determined according to the first information list of the first group of member engines, member engines that are to exchange information; and sending, by the first search server, meta-index information of member engines of the second group of member engines in the second information list to the second search server.