In the conditions of the formation of a technotronic economy, the competitiveness of economic systems is determined by the level of their technological development, which, in turn, depends on the state of the national industrial complex. In the article, based on the use of the European classifier of economic activities, a methodology for assessing the level of technological effectiveness of economic systems is developed and tested on the data of Belarus and China. It is shown that the Belarusian economy is in a state that can be characterized as "technological stagnation", at a time when China is demonstrating dynamic technical and technological progress. It is concluded that it is necessary to give the status of the main strategic priority to a purposeful increase in the technological level of the Belarusian economy.