In today's world, the information technology revolution is on the ascendant, and the digital economy is booming. However, the global economy has entered a recession period. It is difficult to overcome a series of problems such as life safety, food security, energy security, climate warming, etc. faced by human development only by relying on the digital economy. It is urgent to cultivate a new scientific and technological revolution and a new economic growth point. Since we published on Bio-economy in 2003, the progress of bio-technology in China and the world has obviously accelerated, and the new technological revolution of bio-technology and the new industrial revolution of bio-economy has accelerated. Human beings are entering the era of bio-economy. This paper focuses on the development trend of the bio-economy in the world. In this regard, this paper proposes that bio-technology will lead the new scientific and technological revolution, and the bio-economy will lead the new industrial revolution. Then, the concept and connotation of bio-economy are reviewed, the significant characteristics of the new scientific and technological revolution of bio-technology and the new industrial revolution of bio-economy are summarized, and the important role of bio-economy lies in: 1) Promote the fourth wave of economy and promote economic development; 2) Promote the fourth revolution in medicine and extend human life; 3) Promote the second green revolution and ensuring food security; 4) Promote technological change in manufacturing and develop green manufacturing; 5) Develop resources to protect diversity and improve the ecological environment; 6) Develop green energy and alleviate the pressure of energy security; 7) Defend against bio-terrorism and effectively ensure bio-security; 8) Reveal the laws of life, understand and transform and create creatures; 9) Adjust ethical concepts and prevent the abuse of bio-technology; 10) Develop cross-cutting technologies to give birth to a new scientific and technological revolution. The current problems in the development of bio-economy are: 1) Technological progress cannot meet the needs of the development of bio-economy; 2) The bioeconomic system is complex and diverse, which hinders the development of the bio-economy; 3) Technical barriers and trade barriers restrict the circulation and trade of biological products. Finally, combined with the current basic situation of the development of the world's bio-economy, the goals and countermeasures for future bio-economic development are proposed. These include: taking the bio-economy as a strategic industry for the world economy to get out of recession, taking basic research in life sciences as a breakthrough in the development of the bio-economy, creating an "International bio-economy federation", and promoting the coordinated development of the International bio-economy.