The invention relates to a technical field of a box for storing and taking workpieces and tools, in particular to an intelligent project cost budget tool which comprises a box body and a cover plate. An upper end of the box body is provided with an opening and the inner edge of the opening is provided with two oppositely disposed grooves. The two sides of the cover plate fit in the grooves and slide along the inner edge of the opening. One end of the cover plate is fixedly connected with a rotating shaft. The rotating shaft is rotatably connected with a folding plate. The inner side of the folding plate is hinged with a book button with a curved cross section. And the inner side of the folding plate is provided with a bar-shaped groove for receiving the book button. The cover plate is provided with a recess section for engaging the folding plate. The box body is movably connected with a table board which can cover the opening of the box. The intelligent project cost budget tool has the advantages that the tool can effectively deform a toolbox into a desk and has a series of functions such as bookshelves and desks, which improves the on-site office environment quality of staffs and improves the efficiency and the quality of on-site office.