Operation method of food mixer and material supply machine therefor.

Problem to be solved. To highly efficiently obtain various types of dough of western confectionery by executing control to automatically supply a material storage container of a food mixer with additional materials necessary for making the various types of dough of the western confectionery during operation of the food mixer. Solution. An operation method of a food mixer executes automatic control so as to correctly supply a material storage container of the food mixer with target supply amounts of materials necessary for making dough, from a plurality of material supply machines installed at peripheral parts of the food mixer, based on an output signal that a temperature detection sensor detects a target heating temperature of the dough for western confectionery, an output signal that a conductivity detection sensor detects a target conductivity of the dough or/and an output signal that a timer detects expiration of a target operation time.