In a glass processing method and apparatus according to the invention, in the case of performing chemical vapor deposition or diameter shrinkage of a substrate glass tube (G) by relatively moving a heating furnace (20) comprising a heating element (21) for annularly enclosing the circumference of the substrate glass tube in a longitudinal direction of the substrate glass tube (G) with respect to the substrate glass tube (G) in which an outer diameter is 30 mm or more and a wall thickness is 3 mm or more and is less than 15 mm and an ovality of the outer diameter is 1.0 % or less using a glass processing apparatus (1), a temperature of at least one of the heating element (21) and the substrate glass tube (G) is measured and the amount of heat generation of the heating element (21) is adjusted based on the measured temperature.
The glass tube, processed by the method, of reduced ovality is also claimed.