Disclosed is an improved perpetual calendar clock structure. A data window, a month window, a week window and a clock window are arranged on the surface of an outer shell, and a rotary roller set, three sets of driving devices, a clock controller and a battery pack are fixed in the perpetual calendar clock structure. The rotary roller set comprises a data roller, a month roller and a week roller, which are respectively aligned with the windows on the outer shell. The clock controller is aligned with the window thereof, and the three sets of driving devices are respectively installed in the data roller, the month roller and the week roller. Signals are sent through the clock controller to control the driving devices to generate second control signals which are sent to the other rollers to enable the week roller, the data roller and the month roller to act circularly in sequence; correct data, month and week hinges can be turned out through the periodic control signals; and by making use of the wire arrangement in the flexible circuit boards in the rotary roller set, the perpetual calendar clock structure can automatically shift between an odd month and an even month. The improved perpetual calendar clock structure has the advantages that the structures which operate as a whole are integrated into a whole body, so the volume of the overall improved perpetual calendar clock structure is reduced and the improved perpetual calendar clock structure has more industrial competitiveness.