This study aims to examine preschool teachers' thoughts about the child libraries functions. The purpose is to highlight preschool children's early read and writing skills, before they even can read and write, which is a theory called emergent literacy. This is made by conducting five qualitative interviews, with the intention to investigate how the preschool teachers think about the cooperation and the function of the child library, partly for their own work with the children and partly for their organization. By using a tablechart which shows each preschool teachers mostly common thoughts in the interview and by using a model based upon Harrysson and Joelsson (2006) model, which shows the functions of the public library in the society. The results of the study are presented in the four categories of the model which are; to borrow, to learn, to ask and to find, to reside. These are functions that the preschool teachers see with the library, for their work with the childrens' early literacy. The results also show that the preschool teachers use the library services in three main areas; as a literature intermediaer, information provider and they use the library's environment to give inspiration to the children.