Due to its unique geometry, the Kagome lattice intrinsically exhibits topological electronic structures and flat bands, making it an ideal platform for studying novel emergent states. In the recently discovered Kagome superconductors AV3Sb5 (A = K, Rb, Cs), V atoms form an ideal Kagome lattice. As a rare realization of superconductivity on the ideal Kagome lattice, and because superconductivity emerges in the presence of topological surface states and an unusual charge order, these material have drawn immense interest from the physics community. In addition to elucidating the nature of the unusual charge order and its interplay with superconductivity, the superconducting pairing symmetry and pairing mechanism are key issues that need to be addressed.