In this paper, the author pointed out that Marx's ideas and methods of taking labor time as a scale to measure the amount of labor is wrong. Belongs to the flow concept, the amount of labor should be measured with a product of labor time and labor intensity. And then pointed out that the abstract labor, which formed by abstracting away the concrete form of labor, is still have differences, there shouldn't be so-called "undifferentiated general human labor." It was also pointed out that Marx's ideas and methods of measuring the commodity value with the amount of labor or the labor time quantity is wrong too. The amount of labor is not enough to reflect the role of labor in the commodity production; it cannot reflect the value created by labor. The product of the amount of labor condensation in the commodity and the corresponding labor efficiency can exactly reflect the role of labor in the commodity production; it can represent the commodity value or the value created by labor condensation in the commodity. The author thought Marx's definition of "commodity value" concept has no meaning, it doesn't reflect the accurate quantity of labor expenditure in the commodity, and basicly doesn't reflect the quality of labor expenditure. It doesn't represent the real value of labor. The author thought that Marx's labor theory of value is a completely wrong theory.