The evolution of the earth produces life while the evolution of life deeply changes the earth. Fossils are the most direct evidence of earth life evolution; just like the text recorded in the rock stratum of earth, it tells us that the colorful and complex life world has an evolution history of nearly 4 billion years. Some prokaryotes, such as bacteria and cyanobacteria, have lived on earth for more than 3.5 billion years. The macroscopic algae in the ocean have a long evolutionary history and their ancestors may originate from the ancient oceans dating back about 2 billion years ago. Invertebrates have a history of at least tens of millions of years earlier than vertebrates. The most primitive vertebrates can be traced back to the ancient oceans 520 million years ago. Land plants evolved from a kind of algae lived in the ocean about 450 million years ago. Dinosaurs lived on the earth for about 160 million years and they were the extremely successful animals. The history of human is only a very short moment in the history of the earth.