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Along challenging against life-threaten from various viruses for instance avian flu, AIDS, SARS, ect., and enjoying the progresses of molecular biomedicine, it is the time for us to decipher the deep fact on virus origination and evolution. Virus is a non-cell organism existing between life and non-life. It shows a complete parasitic characteristic in its way of living. Concerning its origination and evolution, there are three different hypotheses. One is that virus was generated before cell on the earth of pre-biotic stage. As a former organism, it would evolutinate to prokaryotic cell and eukaryotic cell. The secondary is that both cell and virus were generated simultaneously in the pre-biotic stage. During evolution, virus developed its parasitism on cells. The third is that virus is a macromolecule or macromolecular complex, "being thrown out of cells". It came from cells and was parasitic to cells. Three hypotheses address that eventuaUy, virus evolutinated its complete parasitic style of living. Although the most of biologists believed the third hypothesis previously, they are paying their most attention to aH these hypotheses nowadays regarding the proceedings of medical molecular biology. Both proceedings of molecular biology and natural philosophy show that the understanding to the pluralism of virus origination would be the most credible solution to assure the position of virus on the evolution tree on the earth, which accomplished the central dogma of molecular biology. [ABSTRACT FROM AUTHOR]