Local structure of infinite-layered superconductor (Sr 1 - y C a y 1 - x La x CuO 2 (0 ≤ x ≤ 0.12, 0 ≤ y ≤ 0.20) was investigated by studying the Extended X-Ray Absorption Fine Structure (EXAFS). The results showed that both the Sr 1 - x La x CuO 2 (0 ≤ x ≤ 0.12) and (Sr 1 - y Ca y ) 0 . 9 La 0 . 1 CuO 2 (0 ≤ y ≤ 0.20) systems have local structure consistent with that expected from the ideal infinite-layer structure at room temperature, without obvious deviation of oxygen ions from the CuO 2 plane.