This paper aims to introduce a participatory research method for the preschool education- the mosaic method. Considering the traditional qualitative research methods in preschool education research, teachers or parents are often invited to participate instead of young children, so that children's voices are neglected. Young children are passive subjects rather than actively participating in research. Based on respect for the young children's agency, it is believed that children have the ability to participate in research. The mosaic method allows researchers to obtain information in a multi-sensory and multi-dimensional way, and invites young children to conduct research together. In addition to the connotation and characteristics of the mosaic method, the advantages of this method were analyzed, examples in the literature to explain were given, and at the same time, suggestions for both future study and practice were proposed.