To promote the construction of a socialist cultural power, the “two combinations” need to answer the three basic questions of “why it is inevitable”, “why it is possible”, and “how it is promoted”. From the perspective of theoretical logic, the “two combinations” adequately interpret the internal compatibility of “root vein” and “soul vein” so as to consolidate the subjectivity of Chinese culture. From the perspective of practical logic, the “two combinations” stem from firm cultural and historical confidence, and the practical process plays a role in multi-directions, and can add strong spiritual power into construction of the socialist cultural power. From the perspective of value logic, the “two combinations” adhere to the value that socialist culture serves the people, respect the dominant position and initiative of the people, thus, endowing the socialist cultural life with modern vitality.