He is the fourth child of real-estate tycoon Suchart Ruangpunyawut, president of the Chanuntorn Development Group (a real estate business).

[4] He completed his secondary education at Taweethapisek School, and graduated with a bachelor's in computer engineering at Chulalongkorn University, both in Bangkok.

[4] On 2 November 2022, MFP introduced a bill to the House of Representatives seeking to liberalise and end the oligopoly of the Thai liquor industry, which was narrowly defeated with 177 opposing and 174 in favour.

During the election campaign, Natthaphong represented the MFP at an event at Chulalongkorn University on 3 May 2023 where he spoke on how innovation was crucial to ending corruption in Thailand.

Although the MFP was later dropped by Pheu Thai in favour of pro-military parties, Natthaphong was expected to become the Minister of Digital Economy and Society.

On 20 April 2024, he served on a MFP seminar discussing the digital wallet scheme proposed by Prime Minister Srettha Thavisin, where he raised doubts the readiness of the Tang Rat app.

[13] As the Deputy Secretary-General of the Information and Digital Systems Development Department of the MFP, he was present at the 2024 AI Ethics Exhibition at CentralWorld, Bangkok.

[15] On 7 August 2024, the nine-judge panel of the Constitutional Court of Thailand voted unanimously among itself to dissolve the Move Forward Party.

[19][20] On the 9 August, Natthaphong was voted to be the new leader of Move Forward's successor, the People's Party, at the Thai Summit Tower in Bangkok.