[1] When Woo was a primary school Form 6 student, the family moved to Seoul, where his father rented a one-room with a shared tap and a toilet.

[1][5] Prior to the election, the newly formed opposition New Korea and Democratic Party (NKDP) was gradually gaining popularity among people.

[1] Other than this incident, his colleague, Park Rae-goon (later the President of Human Rights Foundation Saram), visited his military camp and urged him to be an activist.

[14] A day before, they held a practical protest at Yonsei University, but one of the member Lee Han-yeol, who was also a junior to Woo, collapsed to the ground after a tear gas fired by the suppression forces hit his head.

[16][17] The mass demonstrations against military dictatorship led the DJP President and presidential candidate Roh Tae-woo to announce the 29 June Declaration to fulfill the transition to democracy.

However, policemen who caused the death of Lee Han-yeol were not arrested, and Woo Sang-ho were heading to Seoul District Public Prosecutors' Office to complain about the issue.

[3][18] Instead, Woo was jailed under the contempt of the country following an interview with Nicholas Christopher from The New York Times where he compared the South Korean government to Nazi.

[1] He also served as a member of the Steering Committee of the Patriotic Youth Association in 1989 and the Deputy Spokesperson of the National Union for Democracy and Ethnic Reunification in 1992.

[52] After the party had chosen the former Justice Minister Kang Kum-sil as its Seoul mayoral candidate, Woo subsequently joined her campaign.

[56][57] He promised to make Seodaemun as the "district of prestigious education", as well as opposing Yeonhui-dong Chinatown masterplan proposed by the Seoul Mayor Oh Se-hoon.

[82] Under his parliamentary leadership, Woo adopted so-called "member responsibility system", which officially enacts suggestions and alternatives brought during interpellations.

[85][86][87] The incident provoked controversies in South Korean society, and on 26 May 2016, the Democratic Party promised to hold a hearing session to find the truth of the case.

[89] On 3 August, 11 MPs from the Democratic Party including Woo visited Baek, who was in a critical situation, at Seoul National University Hospital.

[104] On 19 July, Woo agreed with Park Jie-won, the then parliamentary leader of the People's Party, regarding an issue related to the proposed Corruption Investigation Office for High-ranking Officials (CIO).

[111] According to the interview, after he received reports related to Choi Soon-sil in July 2016, he formed a private task force with Cho Eung-cheon, Sohn Hye-won and Do Jong-hwan.

[111] However, according to his possible outcome, "go away" would only form a national unity government that could split between the oppositions and the protesters, and Woo, who has suggested the moderate approaches, would fall into a crisis.

[164] He added he would overcome daily issues, for example, (several taxi drivers') refusals to accept passengers, child abuse, and property bid rigging.

[180][181] On 7 February, he met Chung Bong-ju, the ODP pre-candidate, and again agreed to put a single candidate but with a condition, which is that both parties must be merged.

[193][194] Prior to 2021 Seoul mayoral election, Woo joined a meeting held at the National Assembly Proceeding Hall, along with Park Young-sun and the Democratic Party president Lee Nak-yon.

During an interview with People's Solidarity for Participatory Democracy, he condemned the dispatch as "reasonless and horrible", adding that "there must be massacres against the prisoners, as well as mistaken bombing against the civilians".

"[201] He denounced the 7th Congress of the Workers' Party of Korea as "illogical", adding that "denuclearisation while boosting nuclear armament is an unacceptable double standard.

"[201] He again criticised North Korea in February 2017 when the neighbouring country shot a missile shortly after the inauguration of the newly elected US President Donald Trump.

[202] In March 2017, Woo requested the United States government to adopt a hybrid policy towards North Korea, which mixes both sanctions and negotiations.

[203] In June 2022, Woo criticised the President Yoon Suk-yeol for watching a film titled Broker at a cinema after North Korea launched a rocket.

[206] While several politicians criticised the decision as "too late", Woo appeared on Kim Ou-joon's News Factory on 3 February and said, "It's same as no one would enter if South Korea had already cut a tie with China since the beginning.

[208] On 17 May 2000, several Millennium Democratic Party (MDP) MPs along with Woo Sang-ho and a poet Park Nohae went to a karaoke bar named Millennial NHK after the eve memorial ceremony of the Gwangju Uprising.

[219] On 10 February 2021, Woo once again provoked a controversy when he wrote his opinion about a letter of Kang Nan-hee (widow of the former Seoul Mayor Park Won-soon) on his Facebook.

[222] Cho Eun-hee, the Mayor of Seocho and one of the PPP pre-candidate for the Seoul mayorship, questioned him, "Are you going to continue Park's sexual harassments?

[223] Ahn Cheol-soo, the most favourable opposition pre-candidate, asked the Democratic Party to drop the "mad candidate", referring Woo.

[224] Following the public criticisms, Woo explained that he was consoling Park's bereaved family members and not advocating the late's sexual harassments.