Alerting resources environmental carrying capacity helps directly diagnose the status of resources environmental carrying capacity during industrial development, timely make and adjust approaches to industrial development and realize sustainable development. This paper, based on Hainan's 12 key industries, uses alerting technology to set up alerting methods of resources environmental carrying capacity of key industries. In Hainan province, such alerting of tropical agriculture of environmental carrying capacity mainly happens in Wenchang city and Qionghai city, alerting of water resources in the northwest, altering of industries in oceanic oil-gas concentrating Yangpu economic zone. Severe and moderate alerting is in medicine and oceanic oil-gas industrial layout. Local altering happens in tourism and services industries chiefly due to the demands of population over the infrastructures. This paper presents differentiated development and control measurements for key industries of different alerting in different regions, in order to reach a sustainable development under resources environmental carrying capacity.