This book includes the theory system of Unified Trade Economics created by the author as a pioneer. This theory system currently contains a total of about 27 theories. Many theories and thoughts in this book are brand new, the innovative concepts or concepts with innovative contents inside include: trade system, trade main body, trade objective body, local trade product/service/profit, local international trade product/service/profit, local international trade returned product/service/profit, import / export / categorized / bilateral/double differentiation/total/cross-border tradeindicators, trade balance strength, trade balance strength fall, trade competition coefficient, trade harmony coefficient, trade exchange coefficient, trade correlation coefficient, trade competitiveness index, trade cost, trade revenue, trade efficiency, trade profit, trade profit ratio, trade recall ratio, trade return ratio, trade headback ratio, total circulation trade bubble volume (total value), circulation trade bubble degree, social economic bubble degree (trade), social economic bubble volume (trade), trade participation degree, trade market demand volume, trade market demand degree, production capacity gap, outside regional supply capacity, trade capacity, trade capacity gap, trade capacity realization ratio, excessive trade capacity ratio, excessive export trade capacity ratio, import trade capacity gap ratio, evaluation indicator pair, evaluation indicator set, trade advantage set/sequence, trending exchange rate fluctuation, exchange rate trade cost/revenue/profit, exchange rate trade cost ratio/revenue ratio/profit ratio, economic potential energy level (trade), economic potential energy capacity (trade), environmental economic cost (trade), economic green potential energy (trade), tariff revenue, tariff cost, regional economic trade double accounting system, trade management team size social ratio, trade management team size employment ratio, trade achievement management consumption ratio, trade cost management consumption ratio, trade management team per capita cost, management team per capita trade revenue, management team per capita tariff revenue, growth rate of trade indicators, variation rate of trade indicators, trade property indicator sequence (trade structure), trade concentration degree, trade safety property indicator, regional economic trade ratio indicators, trade economic ratio (outside regional dependence degree), etc..This book is a better reading for those who are interested in trade economic research, trade economic management, trade finance management, regional economy, and so on. It also has more significance for those who want to engage in or who are engaged in the work of trade economic research, government or economic management.