The current management research in China focuses too much on the quantitative research and ignores the qualitative research, especially lacks of the guide of normative qualitative methodologies, and this deficiency restricts the promotion of research level. Based on this, the article introduces the history, development and the operation methods of the Classical Grounded Theory systematically, and takes the famous Hawthorne Experiment as an example to analyze the essence of the Classical Grounded Theory, which is the Grounded Spirit, in order to improve the application of the methodology to the management research in China.