NOVELTY - The system has high and low temperature organic Rankine cycle that is coupled through a high temperature condenser. A low temperature loop evaporation pressure sensor (24) is arranged at a pipeline on an inlet side of low temperature loop expansion machine (14). A low temperature loop condenser fan (17) is arranged in front of low temperature loop condenser (16), and driven by a coaxial low temperature loop condenser fan control motor (18). A low temperature loop condensation temperature sensor (31) is arranged at a pipeline on an outlet side of low temperature loop condenser.    USE - Waste heat generation control system of automobile diesel engine.    ADVANTAGE - The heat efficiency of the diesel engine is increased and also the damages from exhaust gas of the diesel engine to the environment are reduced.    DETAILED DESCRIPTION - The system has a generator that is driven for generation by using an electric control unit to convert waste heat carried in exhaust gas of a diesel engine into active power to be output through an organic Rankine cycle of a high temperature loop with closed loop feedback control of evaporation pressure, and also by converting waste heat carried in a cooling liquid of a diesel engine into active power to be output through an organic Rankine cycle of a temperature loop with closed loop feedback control of evaporation pressure and condensation temperature. The high temperature loop organic Rankine cycle is formed by sequential end-to-end connection of a high temperature loop working medium pump (11), a high temperature loop evaporator (4), a high temperature loop expansion machine (7), a high temperature loop condenser (9) and a high temperature loop fluid reservoir (10). A high temperature loop regulating motor (12) is connected with and is used for driving a high temperature loop working medium pump. A high temperature loop pressure regulating valve (13) is connected in parallel with a high temperature loop working medium pump, and is used for limiting the maximum evaporation pressure. The high temperature loop expansion machine is connected with the high temperature loop generator (8), and is used for the latter driving for generation. A high temperature loop evaporation pressure sensor (27) is arranged at a pipeline on an inlet side of the high temperature loop expansion machine. The low temperature loop organic Rankine cycle is formed by sequential end-to-end connection of a low temperature loop working medium pump (20), a high temperature loop condenser, a low temperature loop evaporator (23), a low temperature loop superheater (5), a low temperature loop expansion machine (14), a low temperature loop condenser (16) and a low temperature loop fluid reservoir (19). A low temperature loop regulating motor (21) is connected with and is used for driving a low temperature loop working medium pump. A low temperature loop pressure regulating valve (22) is connected in parallel with a low temperature loop working medium pump, and is used for limiting the maximum evaporation pressure of the low temperature loop. The low temperature loop expansion machine is connected with the low temperature loop generator (15), and is driving the latter for generator. An INDEPENDENT CLAIM is included for waste heat generation control method.    DESCRIPTION OF DRAWING(S) - The drawing shows a circuit block diagram of the waste heat generation control system. (Drawing includes non-English language text)    High temperature loop evaporator (4)    Low temperature loop superheater (5)    High temperature loop expansion machine (7)    High temperature loop generator (8)    High temperature loop condenser (9)    High temperature loop fluid reservoir (10)    High temperature loop working medium pump (11)    High temperature loop regulating motor (12)    High temperature loop pressure regulating valve (13)    Low temperature loop expansion machine (14)    Low temperature loop generator (15)    Low temperature loop condenser (16)    Low temperature loop condenser fan (17)    Coaxial low temperature loop condenser fan control motor (18)    Low temperature loop fluid reservoir (19)    Low temperature loop working medium pump (20)    Low temperature loop regulating motor (21)    Low temperature loop pressure regulating valve (22)    Low temperature loop evaporator (23)    Low temperature loop evaporation pressure sensor (24)    High temperature loop evaporation pressure sensor (27)    Low temperature loop condensation temperature sensor (31)