The invention provides steel plate heat treatment equipment, which includes a heating furnace, a quenching apparatus, a tempering furnace and a conveyer used for conveying a steel plate from the heating furnace to the quenching apparatus and then to the tempering furnace. When the steel plate heat treatment equipment is applied to heat treatment technology, a steel plate only needs to manually be put in the heating furnace and is subjected to heating and thermal insulation through the heating furnace, the conveyer is used to convey the obtained steel plate to the quenching apparatus for quenching, then the conveyer is used to convey the obtained steel plate to the tempering furnace for tempering, and finally the steel plate is taken out of the tempering furnace. When the steel plate heat treatment equipment is in a heat treatment process, the manual handling process is saved, and the time of conveying the steel plate from the heating furnace to the quenching apparatus is saved, so that heat loss of the steel plate in a conveying process is reduced, the effect on quenching hardness of the steel plate due to heat loss is minimized, and the quantity of work of a worker is reduced. The invention further provides steel plate heat treatment technology which is carried out by using the steel plate heat treatment equipment.