The prevalence of obesity has increased rapidly in China since over a decade ago, particularly in children. Central obesity is an independent contributory factor to the development and progression of kidney diseases. Obese people have a higher incidence of chronic kidney disease (CKD), acute kidney injury (AKI), kidney cancer, and urolithiasis, etc. Weight reduction may reverse or slow the progression of kidney injury in the obesity. However, the complications of weight-loss treatment including medicine, bariatric surgery, and intragastric balloon may heighten the risk of kidney injury. Higher caloric intake and lower daily exercise are associated with the ongoing obesity epidemic. So, healthy kidneys need healthy lifestyle for all the people.