Abstract: This report is based upon a follow-up study of the number-concept-mastering process of a child of 3-4 years old. The result of investigationshows that it is not only possible but also necessary for a 3-4-year-oldchild to master the concept of numerals. The development of numeral conceptextension has a certain procedure. The level of number concept is raisedthrough the practice of counting, taking things, comparing, calculating,reading and writing, with counting as the first step. The number conceptcannot be marstered spontaneously, nor is it a result of training andlearning. It plays an important part in overcoming diffculties in reading andmemorizing the numeration table. To master number concept is to masternumerical knowledge; it is a process of cognition, in which functions ofactions and memory are the most prominent.

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