In the theory of international politics, it usually put too much strong on the powers so that we are hardly to discover a character of small powers and not fully understanding the functions of international politics. Actually, the key point of understanding the functions of international politics is to search for the interaction between a big state and a small state. It is complexity, but it makes us to clarify the secret of powers. The more it is complexity, the more it is valuable. In order to dig out the valuable things, as far as I am concerned, using the case study of Ukraine and Russia is the considerable example. First of all, no matter how Ukrainians view Russia or Russia view Ukrainians; we can know that there are the strategies of balancing and bandwagoning within them. Therefore, the concepts of balancing and bandwagoning will be focused on my paper. In addition, Ukraine and Russia had the similarities in language, culture and economic because Ukraine was a part of Soviet Union. Since Ukraine had been an independent country, Russia used statecraft to push small states to bandwagon itself and influence the internal conflict in Ukraine. Then, Ukraine is going to be no strengthens to against Russia. Sooner or later, Russia’s military intervened Ukrainian territory of Crimea in 2014. Finally, this paper tries to analysis how the diversity situation happened between Ukraine and Russia, to argue how the small states can answer and react to the powers’ action, and to provide how the small states play in the international system.