1. A method, implemented on at least one computing device each of which has at least one processor, storage, and a communication platform connected to a network for providing a user interface to a plurality of users, the method comprising: determining a plurality of candidate user interfaces each of which is associated with one or more parameters related to a user interface; providing each of the plurality of candidate user interfaces to a subset of users selected from the plurality of users; obtaining inputs from the plurality of users with respect to each of the plurality of candidate user interfaces; selecting one or more candidate user interfaces from the plurality of candidate user interfaces based on the inputs; generating a new candidate user interface based on the selected one or more candidate user interfaces; identifying a user interface based on the new candidate user interface and the selected one or more candidate user interfaces; and providing the identified user interface to the plurality of users.
1. A method, implemented on at least one computing device each of which has at least one processor, storage, and a communication platform connected to a network for providing a user interface to a plurality of users, the method comprising: determining a plurality of candidate user interfaces each of which is associated with one or more parameters related to a user interface; providing each of the plurality of candidate user interfaces to a subset of users selected from the plurality of users; obtaining inputs from the plurality of users with respect to each of the plurality of candidate user interfaces; selecting one or more candidate user interfaces from the plurality of candidate user interfaces based on the inputs; generating a new candidate user interface based on the selected one or more candidate user interfaces; identifying a user interface based on the new candidate user interface and the selected one or more candidate user interfaces; and providing the identified user interface to the plurality of users. 2. The method of claim 1 , wherein the determining comprises: obtaining a plurality of parameters related to a user interface, wherein each of the plurality of parameters is associated with a predetermined range; and determining the plurality of candidate user interfaces each of which is associated with one or more parameters selected from the plurality of parameters, wherein each of the one or more parameters has a value within the predetermined range.