Book fetching robot for library

The invention relates to a book fetching robot for a library. The book fetching robot for the library comprises a walking device, a controller, a lifting mechanism, a book storage rack, a CCD (charge coupled device) camera, a balancing weight, a mechanical arm and a book clamping plate, wherein the controller is arranged on the walking device; the lifting mechanism is fixed above the walking device; the book storage rack is connected with the lifting mechanism; the CCD camera is fixed on the book storage rack; the balancing weight is fixed on the lifting mechanism and is symmetric to the book storage rack; the mechanical arm is positioned above the lifting mechanism; and the book clamping plate is fixed at the tail end of the mechanical arm. The book fetching robot for the library is used for automatically fetching books from bookshelves in the libraries.