"We have a timeless guide to tackle our shared challenges and fix the world’s fragilities," he said in a message marking the 75th anniversary of UN Charter that falls on June 26.
The UN chief laid emphasis on realizing the UN vision by joining together with humanity, unity and with each other.
Guterres said they today face a global pandemic and worldwide, people rightly raise their voices against racism.
"Confronting problems is a start. But we also have to solve them. That guide is the United Nations Charter," he said.
The Charter was signed 75 years ago – and its principles ring just as true today, said the UN chief.
He said faith in fundamental human rights and the equal rights of men and women. "The dignity and worth of every person."
The UN chief said international law and the peaceful settlement of disputes. "Better standards of life in larger freedom."
He said these enduring values will carry them to a new future - a future where they stop harming the natural environment – and start tackling climate change.
"Where we reject bigotry – and celebrate the richness of human diversity. Where young people lead – in the streets, in their schools, in society," Guterres said.
He said the United Nations was founded before threats like cybercrime and online hate speech emerged.
"But our Charter shows how to rise to these challenges, too," he said.