A travel energy learning device for a host vehicle, said device comprising: a road section identifying unit that is adapted to identify a road section where the host vehicle is currently located, the host vehicle being adapted to be driven by either or both an internal combustion engine and a motor, said device being characterized by further comprising: a work rate information deriving unit that is adapted to derive a work rate of a transmission shaft of said vehicle based on the revolution of the transmission shaft and the torque transmitted by said transmission shaft, wherein the transmission shaft is arranged to transmit a driving force from the internal combustion engine and the motor of the host vehicle to a wheel; and an energy information accumulating unit that is adapted to derive information that indicates the energy required for traveling the road section (S x) based on the derived work rate during travel of the host vehicle through the road section (S x), to link the derived information that indicates the energy required for traveling the road section (S x) to the road section (S x), and to accumulate the information that indicates the energy required for traveling the road section. a road section identifying unit that is adapted to identify a road section where the host vehicle is currently located, the host vehicle being adapted to be driven by either or both an internal combustion engine and a motor, said device being characterized by further comprising: a work rate information deriving unit that is adapted to derive a work rate of a transmission shaft of said vehicle based on the revolution of the transmission shaft and the torque transmitted by said transmission shaft, wherein the transmission shaft is arranged to transmit a driving force from the internal combustion engine and the motor of the host vehicle to a wheel; and an energy information accumulating unit that is adapted to derive information that indicates the energy required for traveling the road section (S x) based on the derived work rate during travel of the host vehicle through the road section (S x), to link the derived information that indicates the energy required for traveling the road section (S x) to the road section (S x), and to accumulate the information that indicates the energy required for traveling the road section. a work rate information deriving unit that is adapted to derive a work rate of a transmission shaft of said vehicle based on the revolution of the transmission shaft and the torque transmitted by said transmission shaft, wherein the transmission shaft is arranged to transmit a driving force from the internal combustion engine and the motor of the host vehicle to a wheel; and an energy information accumulating unit that is adapted to derive information that indicates the energy required for traveling the road section (S x) based on the derived work rate during travel of the host vehicle through the road section (S x), to link the derived information that indicates the energy required for traveling the road section (S x) to the road section (S x), and to accumulate the information that indicates the energy required for traveling the road section.