The orbital forcing cycles, i.e., Milankovitch cycles, are common sedimentary rhythms presented within the ancient deposits, which is key subjects in astrogeology,stratigraphy and sedimentology. Since 19th century, a cyclicity orrhythm of eccentricity,obliquity and precession of Earth orbital paths has been discovered and widely discussed by the researchers all the world. A mechanics of orbital forcing climate cycle, which has a strong effect on depositional sequences through the albedo systems, was focused in a variety of case studies from Quaternary to Precambrian records. The orbital cycles not only display a rhythm itself, but also control depositional stacked patterns, i.e., sedimentary rhythms, from deep sea to tidal settings. Since orbital forcing cycles are characterized by a variation of frequency they have an implication of chronology and give a high resolution durations of stratigraphy, depositional sequences, geological events and biota zones etc. This paper gives a general reviews of the advances in research on orbital cycles, and an approach to the study, including mathem tics and geology based on the studies abroad and home.