To provide a reforming method and a reforming device for heat transfer pipe, simply improving wettability.

By the reforming device K for a heat transfer pipe including: a reforming part 1 having ring burners 11, 12; a carry-in mechanism 2 for carrying the heat transfer pipe W in the reforming part 1; and a carry-out mechanism 3 for carrying out the heat transfer pipe W from the reforming part 1, the feed speed V of the heat transfer pipe W in the carry-in mechanism 2, the feed speed V of the heat transfer pipe in the carry-out mechanism 3, and the heating temperature of the ring burners 11, 12 are adjusted to keep a desired rigidity of the heat transfer pipe W to improve the wettability.