Chris Carter, 56, had likened the smoking ban to a fascist law in Nazi Germany.
Mr Carter challenged the conviction, arguing that the smoking ban breached his human rights under European laws.
The security consultant was fined £1,250 when he was convicted of lighting a cigarette in the council offices in Bangor.
A High Court judge threw out the case saying it was utterly devoid of legal merit.
Mr Carter who received public donations to fund his case said outside the court that he would lodge an immediate appeal against the ruling.
