A method of providing an ultrasound image comprising a medical tool that is inserted into an object, performed by an ultrasound apparatus, the method comprising: obtaining a plurality of steering images corresponding to a plurality of steering angles; detecting the medical tool in each of the plurality of steering images; selecting one of the plurality of steering images based on brightness information of the medical tool in each of the plurality of steering images; detecting a steering angle corresponding to the selected steering image; obtaining an ultrasound image comprising the medical tool by using the detected steering angle; and displaying the obtained ultrasound image on a screen, wherein the selecting of one of the plurality of steering images comprises: selecting a steering image, wherein said selected steering image is referred to as a sixth steering image, comprising the medical tool having a highest brightness value from among the plurality of steering images; characterised in that the step of obtaining an ultrasound image comprising the medical tool by using the detected steering angle comprises: when a brightness value of the medical tool in the sixth steering image is equal to or less than a threshold value, selecting a steering angle, referred to as a seventh steering angle, within a predetermined angle range based on a sixth steering angle corresponding to the sixth steering image; and when a brightness value of a medical tool in a seventh steering image corresponding to the seventh steering angle is greater than the threshold value, selecting the seventh steering image, and obtaining a seventh ultrasound image at the seventh steering angle; and wherein the step of displaying the obtained ultrasound image comprises displaying the seventh ultrasound image. obtaining a plurality of steering images corresponding to a plurality of steering angles; detecting the medical tool in each of the plurality of steering images; selecting one of the plurality of steering images based on brightness information of the medical tool in each of the plurality of steering images; detecting a steering angle corresponding to the selected steering image; obtaining an ultrasound image comprising the medical tool by using the detected steering angle; and displaying the obtained ultrasound image on a screen, wherein the selecting of one of the plurality of steering images comprises: selecting a steering image, wherein said selected steering image is referred to as a sixth steering image, comprising the medical tool having a highest brightness value from among the plurality of steering images; characterised in that the step of obtaining an ultrasound image comprising the medical tool by using the detected steering angle comprises: when a brightness value of the medical tool in the sixth steering image is equal to or less than a threshold value, selecting a steering angle, referred to as a seventh steering angle, within a predetermined angle range based on a sixth steering angle corresponding to the sixth steering image; and when a brightness value of a medical tool in a seventh steering image corresponding to the seventh steering angle is greater than the threshold value, selecting the seventh steering image, and obtaining a seventh ultrasound image at the seventh steering angle; and wherein the step of displaying the obtained ultrasound image comprises displaying the seventh ultrasound image. selecting a steering image, wherein said selected steering image is referred to as a sixth steering image, comprising the medical tool having a highest brightness value from among the plurality of steering images; characterised in that the step of obtaining an ultrasound image comprising the medical tool by using the detected steering angle comprises: when a brightness value of the medical tool in the sixth steering image is equal to or less than a threshold value, selecting a steering angle, referred to as a seventh steering angle, within a predetermined angle range based on a sixth steering angle corresponding to the sixth steering image; and when a brightness value of a medical tool in a seventh steering image corresponding to the seventh steering angle is greater than the threshold value, selecting the seventh steering image, and obtaining a seventh ultrasound image at the seventh steering angle; and when a brightness value of the medical tool in the sixth steering image is equal to or less than a threshold value, selecting a steering angle, referred to as a seventh steering angle, within a predetermined angle range based on a sixth steering angle corresponding to the sixth steering image; and when a brightness value of a medical tool in a seventh steering image corresponding to the seventh steering angle is greater than the threshold value, selecting the seventh steering image, and obtaining a seventh ultrasound image at the seventh steering angle; and wherein the step of displaying the obtained ultrasound image comprises displaying the seventh ultrasound image.