BlogSpriteUnity.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class Sample : MonoBehaviour {

    private Sprite image;
    private Image draw;

	void Start () {

        image = Resources.Load<Sprite>("読み込みたい画像のパス");

        gameObject.GetComponent<Image>().sprite = image;

        draw.sprite = image;
    }
}