Notebook computer system with modular function expansion structure and removable functional expansion module

A notebook computer system with a modular function expansion structure and a removable function expansion module comprise a modular removable function expansion module. The modular function expansion module comprises at least one function expansion bin, a removable function expansion module and an electrical interface, wherein the function expansion bin is embedded in a notebook computer mainframe; the removable function expansion module can be inserted in the function expansion bin and work; and the electrical interface is connected with the removable function expansion module and the mainframe. The function expansion bin is of a single-layered or double-layered or three-layered structure; and at least a computer bus communication interface, a battery power supply interface, a data interface and an integrated interface or a combination of the computer bus communication interface, the battery power supply interface, the data interface and the integrated interface are included in the electrical interface of the function expansion bin. The removable function expansion module consists of a function component enwrapped by a shell and a module connector connected with the electrical interface, the outer appearance of the removable function expansion module or the outer appearance of the removable function expansion module after being superimposed and combined is matched with the inside space of the function module expansion bin. The invention has the advantages of stronger function expansion, configuration update and interchange and universal performance and can provide various types of quick switching external interfaces and function expansion.