For a long time, in the process of measurement, financial accounting always chooses historical cost to measure assets as the basic principle. However, the historical cost attribute is not applicable to all aspects. It only aims at the past and reflects the information of the time point of past transactions or events. When the market price is different from the past, when the market price changes, It is easy to ignore the problem of asset impairment and can not accurately and comprehensively reflect the value of assets, so it can not be used as the decision-making basis for information users.