Alexa can handle a variety of complex language commands, including daily conversations, asking about the weather, playing music, controlling smart home devices, setting alarms and calendar arrangements, and even expanding its functions through skills to meet users' more complex needs, such as providing real-time news summaries, question-and-answer systems, and participating in game interactions. Through deep learning and natural language processing technology, Alexa can understand and parse the user's intentions and make reasonable responses based on the context, although it may still encounter limitations in understanding when processing certain specific areas or complex sentences. Therefore, Alexa's command processing capabilities are gradually enhanced, and it can continuously learn users' preferences and habits to provide more intelligent and personalized services. In short, Alexa has been able to process and understand a variety of language commands and is constantly developing towards a higher level of intelligence.