During the Congress Kim Jong-un will be elevated as the country's supreme leader. The 33 year-old is expected to use the congress to cement his leadership, declare North Korea a nuclear state.
Foreign media invited for the event have not been allowed inside the venue.
The streets are decorated with National and Workers' Party flags with banners that read "Great comrades Kim Il-sung and Kim Jong-il will always be with us" and "Defend the headquarters of the
Korean revolution at the cost of the our lives", reported the BBC.
About 3,000 party members have poured in for this once-in-a-generation political gathering IN North Korea.
Global anxiety and concern raised after North Korea claimed that they successfully tested a miniaturised hydrogen bomb in January this year.