In corporate activity, the Google trend using Big Data is helpful to customer service, marketing, R&D, and M&A in optimizing all activities of corporate management. Furthermore, the Google trend informs about how to measure accurately. Hereupon, this study intended to look into business sales and stock price trends through the use of the strengths of the Google trend which uses Big Data. In addition, this study attempted to deduct the results of statistical significance by doing analysis and research of the numbers of cases where business sales and stock price trends are coincident with the Google trend and vice versa. Accordingly, this study conducted the analysis focusing on BMW and Mercedes-Benz keyword for business sales and stock price prediction by using the Google trend. Also, this study implemented the analysis of the correlation between the Google search volume and sales & stock price which are extracted through this research. As the result, the BMW search volume, sales, and stock price showed relatively low positive correlation. Furthermore, the Mercedes-Benz search volume, sales, and stock price showed a relatively high positive correlation. According to the result of this study, the hypothesis saying that the escalating search volume increases the sales and stock price is shown to be applicable to Mercedes-Benz to some extent. However, the correlation coefficient is not high in the case of BMW, so there is a limitation in applying or generalizing the research result.