This invention is related to a spectacle structure with transformable frames. An upper frame and a lower frame of the spectacle structure mainly have corresponding lens assembling parts. A fixing part is pivotally connected to an assembling rod of the upper frame. A connection section against the assembling rod of the upper frame is disposed in the lower frame. A carrying part of the fixing part support the bottom of the connection section. A positioning flange stops in front of the connection section to combine the upper frame and the lower frame to be as one frame. Accordingly, the upper and the lower frames can be detached to transform between a half-rimmed spectacles and a full-rimmed spectacles depending on needs.