An optimum loom control method controls a loom so that the overall profit of a weaving mill is maximized. A profit evaluation function defining a profit evaluation valve includes variables including those affecting the profit of the weaving mill, such as information on the quality of fabric woven, the number of effective picks representing the quantity of fabric produced, and the energy consumption of the loom. A controlled factor or factors corresponding to a controllable variable or variables from among those of the profit evaluation function, namely, the operating speed of the loom, the pressure of the picking fluid or both the operating speed of the loom and the pressure of the picking fluid, are controlled so that the profit evaluation value is increased to a maximum.