The invention relates to the technical field of etching, and discloses a wet etching apparatus and a wet etching method. The wet etching apparatus comprises a plate receiving chamber, a temperature control chamber, a wet etching chamber, a plate discharging chamber, a conveyer and a temperature control system positioned in the temperature control chamber, and an etching object is conveyed by the conveyer and sequentially goes through the plate receiving chamber, the temperature control chamber, the wet etching chamber and the plate discharging chamber; and the temperature control system is used for adjusting the temperature of the etching object to a preset temperature. The invention also provides the wet etching method. By adopting the above technical scheme in the invention, the temperature of the etching object is adjusted to the preset temperature, so when the etching object is etched by an etching solution, the etching rate consistency is guaranteed, the continuous stability of the etching production is improved, and the large-scale continuous online production requirement can be adapted.