Abstract: Human affairs make ' history”. Without ' affairs”, history becomes abstract and void. Without concrete ' affairs”, the main body of history will be illusory. Humans become the main body of history by taking part in various ' affairs” and activities, while the multiplicity nature determines the multi-facades of the evolution of history. That ' history” made by ' affairs” means the process of human creation of history. But ' affairs” happen under the known condition, and history happens in the existed situation. The existed premise of ' affairs” and ' history” is expressed as ' momentum” and ' reason”. ' Momentum” as the comprehensive situation of ' affairs” and ' history”, as well as ' reason” as the inner law of ' momentum”, discard the arbitrariness of ' affairs” and ' history”, and gives a realistic morphology. A double dimension is formed by ' momentum” and ' reason”, and human activities. The changes of ' affairs” and ' history” are not just the passing of time, but containing real-value content. ' affairs” happen from the need of reality, which involves the development of humans themselves. The evolution of ' history” is related to the direction of development of humans and society. ' Affairs” have their aim, while ' history” has its direction. ' Affairs” are endless, so that ' history is endless. The historical development of humans is generally expressed as it is based on ' affairs” and continuously develops to freedom.