This review discusses recent research on the unconventional superconductivity of $ Sr_{2}RuO_{4} $, a layered perovskite material discovered in 1994. Initially thought to exhibit a spin-triplet chiral p-wave superconducting state, later experiments in 2019 suggested a spin-singlet-like behavior. Innovations in uniaxial strain devices have increased the superconducting transition temperature $ T_c $ from 1.5 K to 3.5 K, consistent with a spin-singlet chiral d-wave superconducting state. However, some aspects remain unresolved. The normal state of $ Sr_{2}RuO_{4} $ exhibits typical Fermi liquid behavior, but understanding its superconducting state requires moving beyond traditional frameworks. The review covers experimental and theoretical perspectives, including Fermi surfaces, spin susceptibility, superconducting gap structure, and phase-sensitive experiments. It also discusses two-component order parameters, time-reversal symmetry breaking, and theoretical models. The review highlights the complexity of $ Sr_{2}RuO_{4} $'s superconducting state and the need for further investigation to resolve remaining mysteries.This review discusses recent research on the unconventional superconductivity of $ Sr_{2}RuO_{4} $, a layered perovskite material discovered in 1994. Initially thought to exhibit a spin-triplet chiral p-wave superconducting state, later experiments in 2019 suggested a spin-singlet-like behavior. Innovations in uniaxial strain devices have increased the superconducting transition temperature $ T_c $ from 1.5 K to 3.5 K, consistent with a spin-singlet chiral d-wave superconducting state. However, some aspects remain unresolved. The normal state of $ Sr_{2}RuO_{4} $ exhibits typical Fermi liquid behavior, but understanding its superconducting state requires moving beyond traditional frameworks. The review covers experimental and theoretical perspectives, including Fermi surfaces, spin susceptibility, superconducting gap structure, and phase-sensitive experiments. It also discusses two-component order parameters, time-reversal symmetry breaking, and theoretical models. The review highlights the complexity of $ Sr_{2}RuO_{4} $'s superconducting state and the need for further investigation to resolve remaining mysteries.