Earlier in the day, the Constitutional Court upheld the ouster of Park, acknowledging she abused her power to help her friend Choi Soon-sil pursue personal gains. Park was impeached by the parliament in December.

"We need to roll out political innovations, as (the people) also impeached our politics," Chung said.

The speaker said all procedures related to the impeachment were conducted with legitimacy, urging all people to accept the decision.

"The ouster marks a farewell to the embarrassing past.

Complying with the needs of the times, we should break away from authoritarianism, collusive ties between business and politics, and corruption," Chung said.

The speaker said South Korea is faced with crucial challenges in the economic, diplomatic and security fields, and people should seek unity to overcome the hurdles. (Yonhap)