A roller structure and method of using the same are introduced. The roller structure includes a first sleeve having a mounting portion for mounting a roller portion and a first connection portion for mounting a carried object, wherein the roller portion is disposed at the mounting portion; and a positioning element disposed at the first sleeve and the roller portion to cause the roller portion to rotate relative to the mounting portion. The roller structure can be conveniently and quickly amounted on the carried object, roller frame or circuit board such that roller structure gets standardized and modularized to serve an industrial purpose and provides rollers rotatable in all directions and suitable for use in SMT (Surface Mount Technology) processes and automated assembly operation.