Study of the hadron spectroscopy plays a key role in understanding the quark confinement of the strong interaction. Many charmomoniumlike states were observed in the past few years at Belle, BaBar, BESIII, and other experiments, and some of them are good candidates of exotic hadrons such as tetraquark states, molecules, or hybrids. In this talk, the recent results from the BESIII and the Belle experiments will be reported, and the possible studies at BESIII and Belle II experiments in the future will also be discussed.