The initial reason is that he is the Europe's longest reigning monarch. Accidentally, he became the king of France when he just turned into five. That innocent king was so young to rule the country at that time. So his mother served as his regent until he grew enough to undertake this immense duty. France was under his reign for 72 years after his death in 1715.
Aside from the first reason, he had contributed in several parts of France's regime. He wished his country was the center of Europe. The emperor started using an absolute monarchy in his country in order to suppress the groups of revolting noble. He also considered on agriculture by encouraging farmers