This research explains and describes the history and importance of positive accounting theory and market models, where this theory will assist in explaining accounting practices and making predictions about market conditions. As the beginning of this research, it will be complemented by previous studies on positive accounting theory and market models. This study uses a qualitative descriptive approach where previous literatures regarding the philosophy of positive accounting theory and how market models in chemical companies are collected and analyzed. Data obtained through journals, books. This study will provide an overview of the philosophy of positive accounting theory and how the market model for chemical companies is through theory and compared with previous research. In the findings of this study it was concluded that the application of positive accounting can have a very good impact on the continuity of the company both in objective financial information, and can be used as a company evaluation, transparency and accountability, and can be made as a reference for making good decisions for the survival of the company. And through market theory, which provides an overview regarding market conditions and conditions both from the past and present which provides an overview of predictions in the future, it will make it easier for chemical companies to determine targets and develop their business both in product marketing, bookkeeping and also being able to provide confidence in the company's stakeholders