This study aim at the advanced malignant tumor patients who suffer from cancer pain, investigate the current status of cancer pain treatment, and study the effects in pain control and quality of life improvement using the method of real-time monitoring and treatment instruction of cancer pain. This study is a randomized, controlled, single center clinical study. After recruitment, the subjects will randomly assign to standard cancer pain treatment group and standard cancer pain treatment plus real-time dynamic monitoring and treatment intervention of cancer pain using the cloud computing concept system. And then, assess the alleviation of cancer pain and quality of live. The assumption is the system will alleviate the cancer pain efficiently.