The concept and advantages of satellite cluster are given, and the new problems of TT&C arising from the application mode of satellite cluster are pointed out. By summarizing the typical research and ap-plication of satellite cluster at home and abroad, the research status and gaps of inter-satellite relative measurement and space internet are compared. Finally, a system of satellite cluster TT&C is proposed, and the key technical problems to resolved are discussed.%给出了星群的概念及优势，指出了星群应用模式给测控带来的新问题。通过跟踪国内外典型的星群研究及应用情况，分析对比了星群应用中星间相对测量和网络技术的国内外研究现状及差距。最后，提出了一种星群测控体系，并对其中亟需解决的关键技术问题进行了论述。
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