Corporate governance study is growing rapidly as compliance with corporate governance is mandatory. Multiple questions rose regarding measurement of Corporate Governance Practices. In this study, the authors argue whether the Corporate Governance characteristics influence the firm performance of Non-Financial Firms in Bangladesh. In this study, three types of industries like pharmaceutical, cement, and food were analyzed from the Dhaka Stock Exchange, Bangladesh for the period of 2010 to 2019. The authors used the diagnostic test on data that argued that the model is better, like the fixed effect model or random-effect model for analysis. Multiple regression based methodology was developed to use fixed-effect model for both dependent variables Return on Assets and Tobin-Q variables to discover the association between Corporate Governance and Firm Performance. It is concluded that Board Size, Board Gender, Board Experience and firm size have significant the ROA and Chief Executive Duality, Board Size, Board Gender, Board Experience, and Firm size have significant with Tobin-Q.