When the tower is just built, some fixed attributes of the tower are written into the label in advance, such as the construction time, tower number, etc. at the same time, the longitude and latitude information of the tower can be recorded by using the GPS positioning device, and these information can also be written into the label as fixed attributes. After each tower maintenance, the staff carry a handheld reader (usually a handheld computer embedded with a read-write module, which is basically the same as the reader) to write the relevant maintenance information into the tag.