At the Internet age, with traditional media declining and discourse ecology changing rapidly, economic globalization, marketization and social informationization are overlapping and the western powers' discourse system is more permeable and controlling, which generates serious situations and complex challenges for the construction of China's discourse system. China must seize firmly the leadership of discourse system construction by strengthening the awareness of cyber sovereignty. China should firmly take the initiative in the construction of discourse system by building a strong Internet power and strengthening the bottom line thinking. China should also enhance its discourse power in the international community by shaping a strong cultural power and intensifying confidence in four aspects.