Today, with the fast development of science and technology, the artificial intelligence has gone much further than people can imagine, such as the robot. Now the first robot is admitted to be a citizen, which scares so many people. Many scientists had predicted that someday robots would replace human being not only in physical work, but also in minds. How terrible it would be. It is said that scientists saw two robots discussing by creating a new language, then they decided to turn down the machine and made them stop working. They knew clearly the danger may happen in the future. Most people have thought about self-consciousness that robot may have some day, but scientists still have a lot of passion in searching the robots. They want to complete everything. But no one can make sure what they can bring for human being.