The worldwide space industry has entered a new space economy era. The question is how to develop in this new era? This paper tries to answer this question from two aspects: highly reliable and low-cost technology for ac cess to space, and the cislunar economic zone. Firstly, the development requirement of the future space transportation system is discussed and the development path to enable high-reliability and a low cost of space transportation system is analyzed. Moreover, the concept of a routine space transportation system is proposed, upon which this paper gives some thoughts to the development of the cislunar economic zone thus embracing the new space economy era.